Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Consolidation Items
Consolidation Items [Axis]
Consolidation Items
Consolidation Items [Domain]
Operating Segments
Operating Segments [Member]
Unallocated
Segment Reconciling Items [Member]
Segments
Segments [Axis]
Reporting Segment
Segments [Domain]
CNBU
CNBU [Member]
Compute and Networking Business Unit ("CNBU") includes memory products sold to compute, networking, graphics, and cloud server markets.
MBU
MBU [Member]
Mobile Business Unit (MBU) includes memory products sold to smartphone, tablet, and other mobile-device markets.
SBU
SBU [Member]
Storage Business Unit (SBU) includes memory products sold into enterprise, client, cloud, and removable storage markets. SBU also includes products sold to Intel through our IMFT joint venture.
EBU
EBU [Member]
Embedded Business Unit (EBU) includes memory products sold into automotive, industrial, connected home, and consumer electronics markets.
All Other
Other Segments [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Reportable Segments
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Number of reportable segments
Number of Reportable Segments
Net sales
Segment Reporting Information, Revenue for Reportable Segment [Abstract]
Revenue
Revenue from Contract with Customer, Excluding Assessed Tax
Operating income (loss)
Segment Reporting Information, Operating Income (Loss) [Abstract]
Stock-based compensation
Allocated Share-based Compensation Expense
Start-up and preproduction costs
Pre-Opening Costs
Employee severance
Severance Costs
Restructure and asset impairments
Restructuring, Settlement and Impairment Provisions
Other
Other Operating Income (Expense), Net
Operating income (loss)
Operating Income (Loss)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Noncontrolling Interest [Table]
Noncontrolling Interest [Table]
Debt Instrument
Debt Instrument [Axis]
Debt Instrument, Name
Debt Instrument, Name [Domain]
IMFT Member Debt
IMFT Member Debt [Member]
Financing provided to IMFT by Intel, a joint venture partner. Debt matures upon wind down of IMFT or is convertible into a capital contribution to IMFT at Intel's option.
Long-term Debt, Type
Long-term Debt, Type [Axis]
Long-term Debt, Type
Long-term Debt, Type [Domain]
Convertible Debt
Convertible Debt [Member]
Scenario
Scenario [Axis]
Scenario
Scenario, Unspecified [Domain]
Forecast
Scenario, Forecast [Member]
Legal Entity
Legal Entity [Axis]
Entity
Entity [Domain]
IM Flash Technologies, LLC
IM Flash Technologies LLC [Member]
IM Flash Technologies, LLC is a joint venture with Intel, which is consolidated into the financial statements of the Company. In general, a VIE is a corporation, partnership, trust, or any other legal structure used for business purposes that either does not have equity investors with voting rights or has equity investors that do not provide sufficient financial resources for the entity to support its activities.
Customer
Customer [Axis]
Customer
Customer [Domain]
Intel
Intel [Member]
Intel Corporation ("Intel").
Ownership
Ownership [Axis]
Ownership
Ownership [Domain]
Other Consolidated Entities
Other Consolidated Entities [Member]
Other Consolidated Entities [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest [Line Items]
Noncontrolling Interest Balance
Stockholders' Equity Attributable to Noncontrolling Interest
Noncontrolling Interest Percentage (in hundredths)
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners
Ownership interest in IMFT (in hundredths)
Noncontrolling Interest, Ownership Percentage by Parent
IMFT sales to Intel at prices approximating cost
Joint Venture Agreement, Terms [Abstract]
Joint Venture Agreement, Terms [Abstract]
Joint Venture Agreement, Terms [Abstract]
Approximate amount expected to be paid to Intel to acquire its interest in IMFT
Payments to Noncontrolling Interests
Current debt
Debt, Current
Joint Venture Agreement, Terms, Intel Percentage of Lookback Supply from IMFT
Joint Venture Agreement, Terms, Period One Partner Output Allotment, Percentage
The allotment of product output a partner can receive during the first period following the closing of the put/call option based on the supply lookback period volumes.
Joint Venture Agreement, Terms, Intel Supply Lookback Period
Joint Venture Agreement, Terms, Supply Lookback Period
The lookback period that determines the amount of supply a partner will receive following the election of a put/call option terminating the joint venture.
Joint Venture Agreement, Terms, Partner Contribution Output Sharing Lag
Joint Venture Agreement, Terms, Partner Contribution Output Sharing Lag
Where rights to output capacity is proportionate to partner investment, the period subsequent to any changes in investment (capital contributions or debt financing) after which supply output to the partners will be adjusted.
Loss Contingency [Abstract]
Loss Contingencies [Table]
Loss Contingencies [Table]
Subsequent Event Type
Subsequent Event Type [Axis]
Subsequent Event Type
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Loss Contingencies by Nature of Contingency
Loss Contingency Nature [Axis]
Loss Contingency, Nature
Loss Contingency, Nature [Domain]
Patent Matters
Patent Matters [Member]
Loss contingencies related to assertions regarding infringement of other's intellectual property rights.
Antitrust Matters
Antitrust Matters [Member]
Loss contingencies related to assertions regarding antitrust matters.
Securities Matters
Securities Matters [Member]
Loss contingencies related to assertions regarding securities matters.
Employment Matters
Employment Matters [Member]
Loss contingencies for alleged employment matters.
Litigation Status
Litigation Status [Axis]
Litigation Status
Litigation Status [Domain]
Pending Litigation
Pending Litigation [Member]
Withdrawn
Withdrawn [Member]
Litigation case withdrawn by the plaintiff.
Litigation Case
Litigation Case [Axis]
Litigation Case Type
Litigation Case [Domain]
MLC Intellectual Property, LLC.
MLC Intellectual Property, LLC. [Member]
MLC Intellectual Property, LLC. [Member]
Elm 3DS Innovations, LLC
Elm 3DS Innovations, LLC [Member]
Elm 3DS Innovations, LLC [Member]
Innovative Memory Solutions, Inc. Complaint 1
Innovative Memory Solutions, Inc. [Member]
Innovative Memory Solutions, Inc. filed a patent infringement action against us in the U.S. District Court for the District of Delaware. The complaint alleges that a variety of our NAND Flash products infringe eight U.S. patent and seeks damages, attorneys' fees, and costs.
Innovative Memory Solutions, Inc. Complaint 2
Innovative Memory Solutions, Inc. Complaint 2 [Member]
Second complaint filed by Innovative Memory Solutions, Inc.
Innovative Memory Solutions, Inc. Complaint 3
Innovative Memory Solutions, Inc. Complaint 3 [Member]
Third complaint filed by Innovative Memory Solutions, Inc.
Fujian Jinhua Integrated Circuit Co., Ltd. Complaint 1
Fujian Jinhua Integrated Circuit Co., Ltd. [Member]
Fujian Jinhua Integrated Circuit Co., Ltd. filed a patent infringement suit against Micron Semiconductor (Xi'an) Co., Ltd.
Fujian Jinhua Integrated Circuit Co., Ltd. Complaint 2
Fujian Jinhua Integrated Circuit Co., Ltd. Complaint 2 [Member]
Fujian Jinhua Integrated Circuit Co., Ltd. Complaint 2 [Member]
United Microelectronics Corporation Complaint 1
United Microelectronics Corporation [Member]
United Microelectronics Corporation filed a patent infringement suit against Micron Semiconductor (Xi'an) Co., Ltd.
United Microelectronics Corporation Complaint 2
United Microelectronics Corporation Complaint 2 [Member]
United Microelectronics Corporation Complaint 2 [Member]
United Microelectronics Corporation Complaint 3
United Microelectronics Corporation Complaint 3 [Member]
United Microelectronics Corporation Complaint 3 [Member]
Qimonda AG Inotera Share Purchase Proceedings
Qimonda AG Inotera Share Purchase Proceedings [Member]
Qimonda AG Inotera Share Purchase Proceedings [Member]
Initial indirect DRAM Purchasers United States
Initial indirect DRAM Purchasers United States [Member]
Indirect DRAM Purchasers United States [Member]
Subsequent indirect DRAM Purchasers United States
Subsequent indirect DRAM Purchasers United States [Member] [Member]
Subsequent indirect DRAM Purchasers United States [Member] [Member]
Initial direct DRAM Purchasers United States
Initial direct DRAM Purchasers United States [Member]
Initial direct DRAM Purchasers United States [Member]
Subsequent direct DRAM Purchasers United States
Subsequent direct DRAM Purchasers United States [Member] [Member]
Subsequent direct DRAM Purchasers United States [Member] [Member]
DRAM Purchasers Canada
DRAM Purchasers Canada [Member]
DRAM Purchasers Canada [Member]
Consolidated Shareholder Class Action New York Court
Consolidated Shareholder Class Action New York Court [Member]
Consolidated Shareholder Class Action New York [Member]
Shareholder Class Action Delaware Court
Shareholder Class Action Delaware Court [Member]
Shareholder Class Action Delaware Court [Member]
Employee Class Action
Employee Class Action [Member]
Employee class action suit alleging unfair performance ratings and related impact to bonus achievements.
Loss Contingencies [Line Items]
Loss Contingencies [Line Items]
Number of patents allegedly infringed
Loss Contingency, Patents Allegedly Infringed, Number
Damages sought on alleged patent infringement
Loss Contingency, Damages Sought, Value
Percent of annualized revenue derived from impacted products
Loss Contingency, Percent of Potentially Impacted Revenue
The estimated percent of revenue that could potentially be impacted by a loss contingency.
Percentage of total Inotera shares subject to litigation (in hundredths)
Subsidiary Or Equity Method Investment, Percentage Of Total Shares Subject To Litigation
The percentage of subsidiary or equity method investee shares that are subject to legal proceedings.
Loss contingency, judgment under appeal
Loss Contingency, Judgment Under Appeal
Loss contingency resulting from a judgment that is currently under appeal. While not probable as of the reporting date, this judgment could result in an obligation to pay the disclosed amount.
Number of pending complaints
Loss Contingency, Pending Claims, Number
Number of new or consolidated claims filed
Loss Contingency, New Claims Filed, Number
Income Tax Disclosure [Abstract]
Schedule of Components of Income Tax (Provision) Benefit
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Revenue from Contract with Customer [Abstract]
Statement [Table]
Statement [Table]
Product and Service
Product and Service [Axis]
Product and Service
Product and Service [Domain]
Contract liabilities from customer advances (product)
Product [Member]
Other contract liabilities
Services and Other Arrangements [Member]
Services and other arrangements.
Statement [Line Items]
Statement [Line Items]
Change in Contract with Customer, Liability [Abstract]
Change in Contract with Customer, Liability [Abstract]
Contract liabilities
Contract with Customer, Liability
Revenue recognized from beginning balance
Contract with Customer, Liability, Revenue Recognized
Additions and other activity
Contract with Customer, Liability, Additions and Other Activity
Additions to contract liabilities during the period as a result of new receipts for obligations to transfer good or service to customer and other adjustments.
Contract with Customer, Refund Liability [Abstract]
Contract with Customer, Refund Liability [Abstract]
Estimated consideration payable to customers for pricing adjustments and returns
Contract with Customer, Refund Liability, Current
Payables and Accruals [Abstract]
Accounts Payable and Accrued Expenses
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
Earnings Per Share [Abstract]
Basic and Diluted Earnings Per Share
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Receivables [Abstract]
Receivables
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Options Granted and Valuation Assumptions
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Schedule of Restricted Stock Awards Activity
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]
Employee Stock Purchase Plan Valuation Assumptions
Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]
Stock-based Compensation Expense by Caption
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table Text Block]
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Intangible Assets and Goodwill
Schedule of Intangible Assets and Goodwill [Table Text Block]
Trade receivables
Accounts Receivable, Net, Current
Income and other taxes
Income Taxes Receivable, Current
Other
Other Receivables, Net, Current
Receivables
Receivables, Net, Current
Segment and Other Information
Segment Reporting Disclosure [Text Block]
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accounts Payable and Accrued Liabilities, Current [Abstract]
Accounts payable
Accounts Payable, Trade, Current
Property, plant, and equipment payables
Equipment Purchase Payable, Current
Carrying value as of the balance sheet date of payables for the acquisition of property, plant and equipment not classified as trade payables. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
Salaries, wages, and benefits
Employee-related Liabilities, Current
Income and other taxes
Taxes Payable, Current
Other
Accounts Payable, Other, Current
Total accounts payable and accrued expenses
Accounts Payable and Accrued Liabilities, Current
Other Income and Expenses [Abstract]
Schedule of Restructuring and Related Costs [Table]
Schedule of Restructuring and Related Costs [Table]
Restructuring Plan
Restructuring Plan [Axis]
Restructuring Plan
Restructuring Plan [Domain]
Restructuring Cost and Reserve [Line Items]
Restructuring Cost and Reserve [Line Items]
Restructure and asset impairments
Other
Other Other Operating Income Expense Net
The net of other operating income and other operating expense, not previously categorized, from items that are associated with the entity's normal revenue producing operation.
Other operating (income) expense, net
Restructuring Reserve [Abstract]
Restructuring Reserve [Abstract]
Current restructuring liability
Restructuring Reserve, Current
Expected Q4 gain on sale of 200mm Singapore fab
Gain (Loss) on Sale of Assets and Asset Impairment Charges
Class of Stock Disclosures [Abstract]
Class of Treasury Stock [Table]
Class of Treasury Stock [Table]
Share Repurchase Program
Share Repurchase Program [Axis]
Share Repurchase Program
Share Repurchase Program [Domain]
Repurchases Authorized May 2018 by the BOD
Stock Repurchases Authorized May 2018 By The Board Of Directors [Member]
Shares of the entity's own stock purchased or authorized to be purchased by the Board of Directors in open market purchases, block trades, privately-negotiated transactions, derivative transactions, and/or pursuant to a rRule 10b5-1 trading plan subject to the best use of available cash beginning in 2019.
Equity, Class of Treasury Stock [Line Items]
Equity, Class of Treasury Stock [Line Items]
Common Stock Repurchase, Authorized Amount
Stock Repurchase Program, Authorized Amount
Treasury Shares Repurchased (in shares)
Treasury Stock, Shares, Acquired
Payments to Acquire Treasury Stock
Payments for Repurchase of Common Stock
Schedule of Variable Interest Entities [Table]
Schedule of Variable Interest Entities [Table]
Variable Interest Entity [Line Items]
Variable Interest Entity [Line Items]
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
Assets
Assets [Abstract]
Cash and equivalents
Cash and Cash Equivalents, at Carrying Value
Receivables
Inventories
Inventory, Net
Other current assets
Other Assets, Current
Total current assets
Assets, Current
Property, plant, and equipment
Property, Plant and Equipment, Net
Other noncurrent assets
Other Assets, Noncurrent
Total assets
Assets
Liabilities
Liabilities [Abstract]
Accounts payable and accrued expenses
Other current liabilities
Other Liabilities, Current
Total current liabilities
Liabilities, Current
Long-term debt
Long-term Debt and Capital Lease Obligations
Other noncurrent liabilities
Other Liabilities, Noncurrent
Total liabilities
Liabilities
Statement of Comprehensive Income [Abstract]
Net income
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Other comprehensive income (loss), net of tax
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Gains (losses) on investments
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax
Gains (losses) on derivative instruments
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax
Foreign currency translation adjustments
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Pension liability adjustments
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax
Other comprehensive income (loss)
Other Comprehensive Income (Loss), Net of Tax
Total comprehensive income
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Comprehensive income attributable to noncontrolling interests
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest
Comprehensive income attributable to Micron
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Statement of Cash Flows [Abstract]
Cash flows from operating activities
Net Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net income to net cash provided by operating activities
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Depreciation expense and amortization of intangible assets
Depreciation, Depletion and Amortization
Amortization of debt discount and other costs
Amortization of Debt Issuance Costs and Discounts
Loss on debt prepayments, repurchases, and conversions
Gain (Loss) on Extinguishment of Debt
Stock-based compensation
Share-based Compensation
Change in operating assets and liabilities
Increase (Decrease) in Operating Capital [Abstract]
Receivables
Increase (Decrease) in Receivables
Inventories
Increase (Decrease) in Inventories
Accounts payable and accrued expenses
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Deferred income taxes, net
Increase (Decrease) in Deferred Income Taxes
Other
Other Operating Activities, Cash Flow Statement
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities
Cash flows from investing activities
Net Cash Provided by (Used in) Investing Activities [Abstract]
Expenditures for property, plant, and equipment
Payments to Acquire Property, Plant, and Equipment
Purchases of available-for-sale securities
Payments to Acquire Debt Securities, Available-for-sale
Proceeds from sales of available-for-sale securities
Proceeds from Sale of Debt Securities, Available-for-sale
Proceeds from government incentives
Proceeds From Government Incentives
Proceeds from government agencies to incentivize certain types of investments, improvements, behaviors, etc.
Proceeds from maturities of available-for-sale securities
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-sale
Other
Payments for (Proceeds from) Other Investing Activities
Net cash provided by (used for) investing activities
Net Cash Provided by (Used in) Investing Activities
Cash flows from financing activities
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments to acquire treasury stock
Repayments of debt
Repayments of Long-term Debt, Long-term Capital Lease Obligations, and Capital Securities
Payments on equipment purchase contracts
Payments on equipment purchase contracts
Payments on Short-term payables arising from purchases of equipment. Amount represents payments on short-term payables to equipment suppliers that were withheld until such time as the equipment is deemed to meet buyers' specifications.
Proceeds from issuance of debt
Proceeds from Issuance of Long-term Debt
Proceeds from issuance of stock
Proceeds from Issuance or Sale of Equity
Other
Proceeds from (Payments for) Other Financing Activities
Net cash provided by (used for) financing activities
Net Cash Provided by (Used in) Financing Activities
Effect of changes in currency exchange rates on cash, cash equivalents, and restricted cash
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Net increase (decrease) in cash, cash equivalents, and restricted cash
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Cash, cash equivalents, and restricted cash at beginning of period
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents
Cash, cash equivalents, and restricted cash at end of period
Variable Interest Entities
Consolidation, Variable Interest Entity, Policy [Policy Text Block]
Schedule of Finite-Lived Intangible Assets [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Range
Range [Axis]
Range
Range [Domain]
Weighted Average
Weighted Average [Member]
Finite-Lived Intangible Assets by Major Class
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name
Finite-Lived Intangible Assets, Major Class Name [Domain]
Product and process technology
Technology-Based Intangible Assets [Member]
In-process R&D placed in service
Technology-Based Assets Previously Classified As In Process Research and Development [Member]
Technology-based assets that were previously classified as in process research and development (non-amortizing) and were subsequently completed, moved into service, and given finite useful lives.
Amortizing assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Gross Amount, Product and process technology
Finite-Lived Intangible Assets, Gross
Accumulated Amortization, Product and process technology
Finite-Lived Intangible Assets, Accumulated Amortization
Increase in amortizing assets
Finite-Lived Intangible Assets, Period Increase (Decrease)
Useful life assigned to assets placed in service
Finite-Lived Intangible Asset, Useful Life
Annual amortization expense for intangible assets [Abstract]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Remainder of 2019
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year
2020
Finite-Lived Intangible Assets, Amortization Expense, Year Two
2021
Finite-Lived Intangible Assets, Amortization Expense, Year Three
2022
Finite-Lived Intangible Assets, Amortization Expense, Year Four
2023
Finite-Lived Intangible Assets, Amortization Expense, Year Five
Schedule of Indefinite-Lived Intangible Assets [Table]
Schedule of Indefinite-Lived Intangible Assets [Table]
Indefinite-lived Intangible Assets
Indefinite-lived Intangible Assets [Axis]
Indefinite-lived Intangible Assets, Major Class Name
Indefinite-lived Intangible Assets, Major Class Name [Domain]
In-process R&D
In Process Research and Development [Member]
Non-amortizing assets [Line Items]
Indefinite-lived Intangible Assets [Line Items]
Gross Amount, In-process R&D
Indefinite-lived Intangible Assets (Excluding Goodwill)
Intangible Assets, Net (Including Goodwill) [Abstract]
Intangible Assets, Net (Including Goodwill) [Abstract]
Gross Amount, Total intangible assets (excluding Goodwill)
Intangible Assets, Gross (Excluding Goodwill)
Goodwill
Goodwill
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
Variable Interest Entity (PTI Xi'an), Nonconsolidated, Carrying Amount of Capital Leases
Variable Interest Entity, Nonconsolidated, Carrying Amount, Liabilities
Variable Interest Entity (PTI Xi'an), Nonconsolidated, Carrying Amount of PP&E
Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets
Other Nonoperating Income (Expense) [Abstract]
Schedule of Other Nonoperating Income (Expense), Net
Schedule of Other Nonoperating Income (Expense) [Table Text Block]
Earnings Per Share Reconciliation [Abstract]
Earnings Per Share Reconciliation [Abstract]
Net income attributable to Micron - Basic
Net Income (Loss) Attributable to Parent
Assumed conversion of debt
Dilutive Securities, Effect on Basic Earnings Per Share, Dilutive Convertible Securities
Net income attributable to Micron – Diluted
Net Income (Loss) Attributable to Parent, Diluted
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Weighted-average common shares outstanding - Basic (in shares)
Weighted Average Number of Shares Outstanding, Basic
Dilutive effect of equity plans and convertible notes (in shares)
Weighted Average Number Diluted Shares Outstanding Adjustment
Weighted-average common shares outstanding - Diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Earnings Per Share, Basic and Diluted [Abstract]
Earnings Per Share, Basic and Diluted [Abstract]
Basic (in dollars per share)
Earnings Per Share, Basic
Diluted (in dollars per share)
Earnings Per Share, Diluted
Antidilutive potential common shares that could dilute basic earnings per share in the future (in shares)
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Income Statement [Abstract]
Cost of goods sold
Cost of Goods and Services Sold
Gross margin
Gross Profit
Selling, general, and administrative
Selling, General and Administrative Expense
Research and development
Research and Development Expense
Other operating (income) expense, net
Operating income
Interest income
Investment Income, Net
Interest expense
Interest Expense
Other non-operating income (expense), net
Other Nonoperating Income (Expense)
Income (loss) before income taxes, net income (loss) attributable to noncontrolling interests, and equity in net income (loss) of equity method investees
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Income tax (provision) benefit
Income Tax Expense (Benefit)
Equity in net income (loss) of equity method investees
Income (Loss) from Equity Method Investments
Net income
Net income attributable to noncontrolling interests
Net Income (Loss) Attributable to Noncontrolling Interest
Net income attributable to Micron
Earnings per share
Number of shares used in per share calculations
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Basic (in shares)
Diluted (in shares)
Equity [Abstract]
Equity
Stockholders' Equity Note Disclosure [Text Block]
Property, Plant and Equipment [Abstract]
Property, Plant, and Equipment
Property, Plant and Equipment Disclosure [Text Block]
Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table]
Award Type
Award Type [Axis]
Equity Award
Equity Award [Domain]
Stock options
Employee Stock Option [Member]
Restricted stock awards
Restricted stock award [Member]
Equity awards that include both restricted stock (stock including a provision that prohibits sale or substantive sale of an equity instrument for a specified period of time or until specified performance conditions are met) and restricted stock units (Share instrument which is convertible to stock after a specified period of time or when specified performance conditions are met).
Employee stock purchase plan (ESPP)
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for future awards (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Fair Value Assumptions, Method Used
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used
Stock options granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross
Weighted-average grant-date fair values per share (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Average expected life (in years)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term
Weighted-average expected volatility (in hundredths)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Weighted Average Volatility Rate
Weighted-average risk-free interest rate (in thousandths)
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate
Expected dividend yield
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Restricted Stock Awards and ESPP activity
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Number of restricted awards granted (in shares)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Weighted-average grant-date fair value per share (in dollars per share)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
ESPP shares issued (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
ESPP shares issued, price per share (in dollars per share)
Shares Issued, Price Per Share
Variable Interest Entities
Consolidation, Policy [Policy Text Block]
Contract Liabilities
Contract with Customer, Asset and Liability [Table Text Block]
Investments [Abstract]
Cash and Investments
Cash, Cash Equivalents, and Marketable Securities [Text Block]
Statement of Financial Position [Abstract]
Liabilities and equity
Liabilities and Equity [Abstract]
Common Stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common Stock, authorized shares (in shares)
Common Stock, Shares Authorized
Common Stock, issued (in shares)
Common Stock, Shares, Issued
Common Stock, outstanding (in shares)
Common Stock, Shares, Outstanding
Treasury Stock, held (in shares)
Treasury Stock, Common, Shares
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
Recently Adopted Accounting Standards
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Capital lease obligations
Capital Lease Obligations [Member]
Reorganization obligation
Reorganization obligation [Member]
The liabilitiy owed to secured and unsecured creditors subject to a reorganization plan as part of bankruptcy proceedings.
Secured Debt
Secured Debt [Member]
Corporate Bonds
Corporate Debt Securities [Member]
Notes Payable, Other Payables
Notes Payable, Other Payables [Member]
2022 Term Loan B
Term Loan B Credit Facility 1 [Member]
The company's first Term Loan B Credit Facility.
2025 Notes
Unsecured senior corporate debt due 2025 [Member]
Unsecured senior corporate debt due 2025 [Member]
2032D Notes
Convertible senior notes due 2032D [Member]
A borrowing which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder. Series due May 2032D.
2033F Notes
Convertible senior note due 2033F [Member]
A borrowing which can be exchanged for a specific amount of another security, typically the entity's common stock, at the option of the issuer or the holder. Series due February 2033F.
2043G Notes
Convertible Senior Note Due 2043G [Member]
A borrowing which can be exchanged for a specific amount of another security, typically the entity's common stock, at the option of the issuer or the holder. Series due November 2043G.
2024 Notes, 2026 Notes, and 2029 Notes
Senior Unsecured Notes Due 2024_2026_2029 [Member]
Senior unsecured notes due 2024, 2026, and 2029 issued February 2019.
2024 Notes
Unsecured Senior Corporate Debt due 2024_2 [Member]
Unsecured senior corporate debt due 2024 issued February 2019.
2026 Notes
Unsecured Senior Corporate Debt Due 2026_2 [Member]
Unsecured senior corporate debt due 2026 issued February 2019.
2029 Notes
Unsecured Senior Corporate Debt Due 2029 [Member]
Unsecured senior corporate debt due 2029 issued February 2019.
Revolving Credit Facility
Revolving Credit Facility 5 [Member]
Revolving Credit Facility 5 - arrangement in which loan proceeds can continuously be obtained following repayments, but the total amount borrowed cannot exceed a specified maximum amount.
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Long-term Debt, by Current and Noncurrent [Abstract]
Long-term Debt, by Current and Noncurrent [Abstract]
Stated Rate (in ten thousandths)
Debt Instrument, Interest Rate, Stated Percentage
Effective Rate (in ten thousandths)
Debt Instrument, Interest Rate, Effective Percentage
Total
Debt and Capital Lease Obligations
Senior Unsecured Notes
Unsecured Debt [Abstract]
Debt issuance costs
Debt Issuance Costs, Net
Redemption option at par, period prior to maturity
Debt Instrument, Redemption Option at Par, Period Prior to Maturity
For a debt instrument with redemption features, the period of time prior to maturity during which the debt may be redeemed at par value, in 'PnYnMnD' format.
Restricted subsidiaries, ownership percentage by parent
Debt Instrument, Domestic Restricted Subsidiaries, Ownership Percentage by Parent
Debt Instrument, Domestic Restricted Subsidiaries, Ownership Percentage by Parent which among other things, limit in certain circumstances to create or incur certain liens and guarantees or consolidate or merge.
Redemption price percentage upon change in control
Debt Instrument, Redemption Price, Percentage
Convertible Senior Notes
Convertible Debt [Abstract]
Conversion rights, minimum number of trading days (in days)
Debt Instrument, Convertible, Threshold Trading Days
Conversion rights, consecutive trading period (in days)
Debt Instrument, Convertible, Threshold Consecutive Trading Days
Conversion rights, threshold percentage of applicable conversion price (in hundredths)
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger
Conversion value of convertible notes
Debt Instrument, Convertible, If-converted Value
The convertible debt's if-converted value amount at the balance sheet date, regardless of whether the instrument is currently convertible. This element applies to public companies only.
Principal amount of convertible notes
Long-term Debt, Gross
Conversion value in excess of principal
Debt Instrument, Convertible, If-converted Value in Excess of Principal
Available Revolving Credit Facility [Abstract]
Other Long-term Debt [Abstract]
Line of credit facility, Maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Recently Issued Accounting Standards Not Yet Adopted
Description of New Accounting Pronouncements Not yet Adopted [Text Block]
Schedule of Derivative Instruments
Schedule of Derivative Instruments [Table Text Block]
Schedule of Gains and Losses on Fair Value Hedges
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]
Schedule of Receivables
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Debt
Debt and Capital Leases Disclosures [Text Block]
Schedule of Other Operating (Income) Expense, Net
Schedule of Other Operating Cost and Expense, by Component [Table Text Block]
New Accounting Pronouncements or Change in Accounting Principle [Table]
New Accounting Pronouncements or Change in Accounting Principle [Table]
Adjustments for New Accounting Pronouncements
Adjustments for New Accounting Pronouncements [Axis]
Type of Adoption
Type of Adoption [Domain]
ASC 606
Accounting Standards Update 2014-09 [Member]
ASU 2016-16
Accounting Standards Update 2016-16 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred tax assets
Deferred Income Tax Assets, Net
Retained earnings
Retained Earnings (Accumulated Deficit)
Inventory Disclosure [Abstract]
Inventory, Net, Items Net of Reserve Alternative [Abstract]
Finished goods
Inventory, Finished Goods, Net of Reserves
Work in process
Inventory, Work in Process, Net of Reserves
Raw materials and supplies
Inventory, Raw Materials and Supplies, Net of Reserves
Inventories
Basis of Presentation
Basis of Accounting [Text Block]
Schedule of Property, Plant, and Equipment [Table]
Property, Plant and Equipment [Table]
Property, Plant and Equipment by Type
Property, Plant and Equipment, Type [Axis]
Property, Plant and Equipment, Type
Property, Plant and Equipment, Type [Domain]
Land
Land [Member]
Buildings
Building and Building Improvements [Member]
Equipment
Equipment [Member]
Equipment not placed into service
Equipment not placed into service [Member]
Equipment which has not placed into service as it is still in the process of being installed and qualified.
Construction in progress
Construction in Progress [Member]
Software
Software and Software Development Costs [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Net, by Type [Abstract]
Property, Plant and Equipment, Net, by Type [Abstract]
Gross property, plant, and equipment
Property, Plant and Equipment, Gross
Accumulated depreciation
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Property, plant, and equipment, net
Intangible Assets and Goodwill
Goodwill and Intangible Assets Disclosure [Text Block]
Short-term investments
Debt Securities, Available-for-sale, Current
Total current assets
Long-term marketable investments
Debt Securities, Available-for-sale, Noncurrent
Intangible assets
Intangible Assets, Net (Excluding Goodwill)
Total assets
Total current liabilities
Noncurrent unearned government incentives
Unearned Government Incentives, Noncurrent
Liability for government incentives (proceeds from government agencies to incentivize certain types of investments, improvements, behaviors, etc.) that are expected to be recognized (earned) after one year or beyond the normal operating cycle, if longer.
Total liabilities
Commitments and contingencies
Commitments and Contingencies
Redeemable convertible notes
Temporary Equity, Carrying Amount, Attributable to Parent
Redeemable noncontrolling interest
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount
Micron shareholders' equity
Stockholders' Equity Attributable to Parent [Abstract]
Common stock, $0.10 par value, 3,000 shares authorized, 1,180 shares issued and 1,104 outstanding (1,170 shares issued and 1,161 outstanding as of August 30, 2018)
Common Stock, Value, Issued
Additional capital
Additional Paid in Capital, Common Stock
Treasury stock, 76 shares held (9 shares as of August 30, 2018)
Treasury Stock, Common, Value
Accumulated other comprehensive income
Accumulated Other Comprehensive Income (Loss), Net of Tax
Total Micron shareholders' equity
Stockholders' Equity Attributable to Parent
Noncontrolling interests in subsidiaries
Total equity
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest
Total liabilities and equity
Liabilities and Equity
Document and Entity Information [Abstract]
Document and Entity Information [Abstract]
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Document Type
Document Type
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Amendment Flag
Amendment Flag
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Entity Current Reporting Status
Entity Current Reporting Status
Entity Small Business
Entity Small Business
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Shell Company
Entity Shell Company
Contingencies
Contingencies Disclosure [Text Block]
Derivative [Table]
Derivative [Table]
Hedging Designation
Hedging Designation [Axis]
Hedging Designation
Hedging Designation [Domain]
Designated hedging instruments
Designated as Hedging Instrument [Member]
Not designated hedging instruments
Not Designated as Hedging Instrument [Member]
Hedging Relationship
Hedging Relationship [Axis]
Hedging Relationship
Hedging Relationship [Domain]
Cash flow hedges
Cash Flow Hedging [Member]
Derivative Instrument
Derivative Instrument [Axis]
Derivative Contract
Derivative Contract [Domain]
Currency forward
Foreign Exchange Forward [Member]
Convertible notes settlement obligation
Equity Contract [Member]
Derivative [Line Items]
Derivative [Line Items]
Notional Disclosures [Abstract]
Notional Disclosures [Abstract]
Gross Notional Amount, Currency forwards
Derivative, Notional Amount
Gross Notional Amount, Convertible notes settlement obligation (in shares)
Derivative, Nonmonetary Notional Amount
Derivative, Fair Value, Net [Abstract]
Derivative, Fair Value, Net [Abstract]
Fair Value of Current Assets
Derivative Asset, Fair Value, Gross Asset
Fair Value of Current Liabilities
Derivative Liability, Fair Value, Gross Liability
General maturity of currency forward contracts (in months)
Maximum Remaining Maturity of Foreign Currency Derivatives
Statement of Stockholders' Equity [Abstract]
Equity Components
Equity Components [Axis]
Equity Component
Equity Component [Domain]
Common Stock
Common Stock [Member]
Additional Capital
Additional Paid-in Capital [Member]
Retained Earnings
Retained Earnings [Member]
Treasury Stock
Treasury Stock [Member]
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent [Member]
Total Micron Shareholders' Equity
Parent [Member]
Noncontrolling Interests in Subsidiaries
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance (in shares)
Balance
Cumulative effect of adopting new accounting standards
Cumulative Effect of New Accounting Principle in Period of Adoption
Net income (excluding redeemable noncontrolling interest)
Net Income (Loss), Including Portion Attributable to Nonredeemable Noncontrolling Interest
Other comprehensive income (loss), net
Contributions from noncontrolling interests
Noncontrolling Interest, Increase from Subsidiary Equity Issuance
Stock issued in public offering (in shares)
Stock Issued During Period, Shares, New Issues
Stock issued in public offering
Stock Issued During Period, Value, New Issues
Stock issued under stock plans (in shares)
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures
Stock issued under stock plans
Stock Issued During Period, Value, Share-based Compensation, Net of Forfeitures
Stock-based compensation expense
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition
Repurchase of stock (in shares)
Stock Repurchased and Retired During Period, Shares
Repurchase of stock
Stock Repurchased and Retired During Period, Value
Accelerated share repurchase program
Accelerated Share Repurchase Program, Adjustment
Repurchase of stock
Treasury Stock, Value, Acquired, Cost Method
Repurchase of stock (held and retired)
Stock Repurchased and Retired and Treasury Shares Acquired
Equity impact of 1) the value of stock that has been repurchased and retired during the period (excess of the purchase price over par value can be charged against retained earnings once the excess is fully allocated to additional paid in capital) and 2) the cost of common and preferred stock that were repurchased during the period through single or various means.
Acquisitions of noncontrolling interest
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests
Settlement of capped calls
Option Indexed To Issuer's Equity, Settlement, Effect on Shareholders' Equity
The effect of settlements of options indexed to issuer's equity of shareholders' equity.
Reclassification of redeemable convertible notes, net
Increase (Decrease) in Equity for Reclassifications of Convertible Debt (to) from Mezzanine
Reclassification adjustment for redeemable convertible notes, which is convertible debt that requires the principal to be settled in cash. The reclassifications include accretion of the carrying value of convertible debt and the debt becoming or ceasing to be convertible.
Conversion of convertible notes
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt, Subsequent Adjustments
Treasury stock reissued to settle conversion and repurchase of convertible notes
Stock Issued During Period, Value, Treasury Stock Reissued
Balance (in shares)
Balance
Other Non-Operating Income (Expense), Net
Other Nonoperating Income and Expense [Text Block]
Inventories
Inventory Disclosure [Text Block]
Cash and Investments
Cash, Cash Equivalents and Investments [Table Text Block]
Cash and equivalents and the fair values of available-for-sale investments
Debt Securities, Available-for-sale [Table Text Block]
Equity Plans
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table]
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table]
Income Statement Location
Income Statement Location [Axis]
Income Statement Location
Income Statement Location [Domain]
Cost of goods sold
Cost of Sales [Member]
Selling, general, and administrative
Selling, General and Administrative Expenses [Member]
Research and development
Research and Development Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Stock-based compensation
Employee Service Share-based Compensation, Aggregate Disclosures [Abstract]
Tax benefit from compensation expense
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense
Total unrecognized compensation costs related to unvested awards expected to be recognized
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized
Weighted average period that unrecognized compensation costs is expected to be recognized (in years)
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition
Extinguishment of Debt Disclosures [Abstract]
Schedule of Extinguishment of Debt [Table]
Schedule of Extinguishment of Debt [Table]
Extinguishment of Debt
Extinguishment of Debt [Axis]
Extinguishment of Debt
Extinguishment of Debt, Type [Domain]
Extinguishment of Debt [Line Items]
Extinguishment of Debt [Line Items]
Conversion rate (in shares per $1000 principal)
Debt Instrument, Convertible, Conversion Ratio
Principal amount used In conversion rate
Debt Instrument, Convertible, Principal Per Debenture Used In Conversion Rate
The principal amount per debenture used in conversion rate.
Derivative, Term of Contract
Derivative, Term of Contract
Decrease in Principal
Extinguishment of Debt, Amount
Increase (Decrease) in Principal (conversions and issuances)
Debt Instrument Net Increase (Decrease) Principal
The net increase (decrease) in principal amount of debt for the period.
Increase (Decrease) in Carrying Value
Debt Instrument, Increase (Decrease), Net
Decrease in Cash
Repayments of Debt
Increase in Cash
Proceeds from Debt, Net of Issuance Costs
Increase (Decrease) in Cash (conversions and issuances)
Increase (Decrease) in Cash From Certain Debt Activities, Net
The net increase (decrease) in cash from debt issuances and unscheduled debt repayments during the period.
Decrease in Equity
Gain (Loss) on debt prepayments, repurchases, and conversions
Gains Losses On Extinguishment Of Debt And Derivative Gain Loss On Derivative Net
Total loss on extinguishment of debt for both the difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity and the amount of increase (decrease) in the fair value of derivatives recognized in the income statement.
Derivative Instruments, Gain (Loss) [Table]
Derivative Instruments, Gain (Loss) [Table]
Fair value hedges
Fair Value Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) [Line Items]
Net gains (losses) recognized in other comprehensive income, effective portion
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, before Tax
Gain (Loss) on Fair Value Hedges Recognized in Earnings [Abstract]
Gain (Loss) on Fair Value Hedges Recognized in Earnings [Abstract]
Gain (loss) on remeasurement of hedged assets and liabilities
Change in Unrealized Gain (Loss) on Hedged Item in Foreign Currency Fair Value Hedge
Gain (loss) on derivatives designated as hedging instruments
Change in Unrealized Gain (Loss) on Foreign Currency Fair Value Hedging Instruments
Amortization of amounts excluded from hedge effectiveness
Gain (Loss) on Components Excluded from Assessment of Foreign Currency Fair Value Hedge Effectiveness
Loss on fair value hedges recognized in earnings
Gain (Loss) on Fair Value Hedges Recognized in Earnings
Net gains (losses) for derivative instruments without hedge accounting designation
Derivative, Gain (Loss) on Derivative, Net
Research and Development [Abstract]
Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table]
Schedule of Collaborative Arrangements and Non-collaborative Arrangement Transactions [Table]
Type of Arrangement and Non-arrangement Transactions
Type of Arrangement and Non-arrangement Transactions [Axis]
Arrangements and Non-arrangement Transactions
Arrangements and Non-arrangement Transactions [Domain]
Collaborative Arrangement Process Design and Process Development
Collaborative Arrangement Process Design and Process Development [Member]
Contractual arrangement for process design and process development that involves two or more parties that both: (i) actively participate in a joint operating activity and (ii) are exposed to significant risks and rewards that depend on the commercial success of the joint operating activity.
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Reduction in R and D expenses for reimbursements from partners
Expense Reduction From Cost Sharing Arrangement
Reduction to expense as a result of reimbursements received under a cost sharing arrangement.
Revenue, Initial Application Period Cumulative Effect Transition [Abstract]
Revenue, Initial Application Period Cumulative Effect Transition [Table]
Revenue, Initial Application Period Cumulative Effect Transition [Table]
Initial Application Period Cumulative Effect Transition
Initial Application Period Cumulative Effect Transition [Axis]
Initial Application Period Cumulative Effect Transition
Initial Application Period Cumulative Effect Transition [Domain]
Difference between Revenue Guidance in Effect before and after Topic 606
Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Calculated under Revenue Guidance in Effect before Topic 606
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Income Statement [Abstract]
Net income attributable to Micron
Balance Sheet [Abstract]
Balance Sheet Related Disclosures [Abstract]
Schedule of Inventories
Schedule of Inventory, Current [Table Text Block]
Fair Value Disclosures [Abstract]
Fair Value Measurements
Fair Value Disclosures [Text Block]
Schedule of Results by Segment
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Revenue by Product Type
Revenue from External Customers by Products and Services [Table Text Block]
Estimated fair value and carrying value of debt instruments
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block]
Total IMFT assets and liabilities
Schedule of Variable Interest Entities [Table Text Block]
Schedule Of Noncontrolling Interests In Subsidiaries
Noncontrolling Interest Disclosure [Text Block]
Revenue and Contract Liabilities
Revenue from Contract with Customer [Text Block]
Loss on debt prepayments, repurchases, and conversions
Loss from changes in currency exchange rates
Foreign Currency Transaction Gain (Loss), before Tax
Other
Other Other Nonoperating Income Expense
The net of other nonoperating income and other nonoperating expense, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items.
Other non-operating income (expense), net
Income Taxes
Income Tax Disclosure [Text Block]
Basis of Accounting
Basis of Accounting, Policy [Policy Text Block]
Comparability
Comparability of Prior Year Financial Data, Policy [Policy Text Block]
Reclassifications
Reclassification, Policy [Policy Text Block]
Fiscal Period
Fiscal Period, Policy [Policy Text Block]
Research and Development
Collaborative Arrangement Disclosure [Text Block]
Financial Statement Impact from Adoption of New Accounting Standards
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]
Schedule of Property, Plant, and Equipment
Property, Plant and Equipment [Table Text Block]
Earnings Per Share
Earnings Per Share [Text Block]
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income tax (provision) benefit, excluding items below
Other Tax Expense (Benefit)
Utilization of and other changes in net deferred tax assets of MMJ, MMT, and MTTW
Deferred Foreign Income Tax Expense (Benefit)
Repatriation Tax, net of adjustments related to uncertain tax positions
Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)
Amount of income tax expense (benefit) for measurement period adjustment from accounting for tax effect pursuant to Tax Cuts and Jobs Act.
Release of the valuation allowance on net deferred tax assets of our U.S. operations
Deferred Other Tax Expense (Benefit)
Remeasurement of deferred tax assets and liabilities reflecting lower U.S. corporate tax rates
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Income Tax Expense (Benefit)
Amount of income tax expense (benefit) for remeasurement of deferred tax from change in tax rate pursuant to Tax Cuts and Jobs Act.
Income Tax Expense (Benefit)
Unrecognized Tax Benefits
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized income tax benefits
Unrecognized Tax Benefits
Tax benefit from incentive arrangements
Income Tax Holiday, Aggregate Dollar Amount
Tax benefit per diluted share from incentive arrangements
Income Tax Holiday, Income Tax Benefits Per Share
Revenue from External Customers by Products and Services [Table]
Revenue from External Customers by Products and Services [Table]
DRAM
DRAM Products [Member]
DRAM semiconductor products
NAND
NAND Products [Member]
NAND semiconductor products
Other (primarily 3D XPoint memory and NOR)
Other Product Sales [Member]
Net other product sales to external customers.
Concentration Risk Type
Concentration Risk Type [Axis]
Concentration Risk Type
Concentration Risk Type [Domain]
Customer Concentration Risk
Customer Concentration Risk [Member]
Concentration Risk Benchmark
Concentration Risk Benchmark [Axis]
Concentration Risk Benchmark
Concentration Risk Benchmark [Domain]
Revenue
Sales Revenue, Net [Member]
Huawei Technologies Co., Ltd.
Huawei Technologies Co., Ltd. [Member]
Huawei Technologies Co., Ltd.
Revenue from External Customer [Line Items]
Revenue from External Customer [Line Items]
Customer concentration, percentage
Concentration Risk, Percentage
Schedule of Accounts Payable And Accrued Expenses
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]
Other Operating (Income) Expense, Net
Other Operating Income and Expense [Text Block]
Schedule of Debt
Schedule of Long-term Debt Instruments [Table Text Block]
Schedule of Debt Conversions, Settlements, and Issuances
Schedule of Extinguishment of Debt [Table Text Block]
Fair and carrying value of debt instruments [Table]
Fair Value, by Balance Sheet Grouping [Table]
Measurement Basis
Measurement Basis [Axis]
Measurement Basis
Fair Value Measurement [Domain]
Portion at Fair Value Measurement
Portion at Fair Value Measurement [Member]
Fair Value
Estimate of Fair Value Measurement [Member]
Carrying Value
Reported Value Measurement [Member]
Fair Value, Hierarchy
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy
Fair Value Hierarchy and NAV [Domain]
Level 2
Fair Value, Inputs, Level 2 [Member]
Notes and MMJ Creditor Payments
Reorganization Obligation And Other Notes [Member]
The liabilities owed to secured and unsecured creditors subject to a reorganization plan as part of bankruptcy proceedings combined with senior and other notes payable.
Convertible notes
Fair value disclosure [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value of Notes and MMJ Creditor Payments
Notes Payable, Fair Value Disclosure
Fair Value of Convertible notes
Convertible Debt, Fair Value Disclosures
Carrying Value of Debt
Schedule of Available-for-sale Securities [Table]
Schedule of Available-for-sale Securities [Table]
Financial Instrument
Financial Instrument [Axis]
Financial Instruments
Financial Instruments [Domain]
Cash
Cash [Member]
Money market funds
Money Market Funds [Member]
Certificates of deposit
Certificates of Deposit [Member]
Government securities
Sovereign Debt [Member]
Asset-backed securities
Asset-backed Securities [Member]
Commercial paper
Commercial Paper [Member]
Level 1
Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale [Line Items]
Cash and Equivalents
Short-term Investments
Long-term Marketable Investments
Total Fair Value
Cash, Cash Equivalents, and Available-for-Sale Debt Securities
Amount of cash and equivalents and investment in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).
Restricted cash
Restricted Cash, Noncurrent
Cash, cash equivalents, and restricted cash
Long-term marketable investments, general maturities (in years)
Long Term Marketable Securities General Maturities Term
The general maturity period (in years) for the Company's long term marketable securities.
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Debt Securities, Available-for-sale, Unrealized Loss Position [Abstract]
Available-for-sale securities in an unrealized loss position for longer than twelve months
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer