Contingencies (Details) ¥ in Millions, $ in Millions	12 Months Ended
	Sep. 02, 2021 CNY (¥) patent complaint agreement	Sep. 02, 2021 USD ($) patent complaint agreement	Aug. 30, 2018
Innovative Memory Solutions, Inc. vs Micron-Complaint 1 | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	8	8
Loss Contingency, Patents Found Not Infringed, Number | patent	6	6
Flash-Control, LLC vs Micron | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	4	4
Loss Contingency, Patents Found Not Infringed, Number | patent	2	2
Pending Litigation | Securities Matters
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	2	2
Pending Litigation | MLC Intellectual Property, LLC vs Micron | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | Innovative Memory Solutions, Inc. vs Micron-Complaint 1 | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	2	2
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | Fujian Jinhua Integrated Circuit Co., Ltd. vs Micron-Complaint 1 | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Damages sought on alleged patent infringement | ¥	¥ 98
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | Fujian Jinhua Integrated Circuit Co., Ltd. vs Micron-Complaint 2 | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Damages sought on alleged patent infringement | ¥	¥ 98
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | United Microelectronics Corporation vs Micron-Complaint 1 | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Damages sought on alleged patent infringement | ¥	¥ 90
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | United Microelectronics Corporation vs Micron-Complaint 2 | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Damages sought on alleged patent infringement | ¥	¥ 90
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | Fuzhou Court Preliminary Injunction | Patent Matters
Loss Contingencies [Line Items]
Percent of annualized revenue derived from impacted products			1.00%
Pending Litigation | Flash-Control, LLC vs Micron | Patent Matters
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | Netlist Inc. vs Micron | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	1	1
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | Netlist Inc vs Micron - Complaint 2 | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	3	3
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | Vervain LLC vs Micron | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	4	4
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | Claims on Behalf of Indirect Purchasers | Antitrust Matters
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | DRAM Purchasers Canada vs Micron | Antitrust Matters
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	6	6
Pending Litigation | Micron vs United Microelectronics Corp and Fujian Jinhua Integrated Circuit Co
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	1	1
Pending Litigation | Micron Intel JV Arbitration Matter | Minimum
Loss Contingencies [Line Items]
Loss Contingency, Agreements Allegedly Breached, Number | agreement	1	1
Pending Litigation | Allied Telesis K.K. vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	1	1
Dismissed Litigation | Elm 3DS Innovations, LLC vs Micron | Patent Matters
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent	13	13
Loss Contingency, Claims Dismissed, Number	1	1
Dismissed Litigation | Subsequent indirect DRAM Purchasers United States vs Micron | Antitrust Matters
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number	2	2
Dismissed Litigation | Subsequent direct DRAM Purchasers United States vs Micron | Antitrust Matters
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number	4	4
Dismissed Litigation | Claims on Behalf of Direct Purchasers | Antitrust Matters
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number	1	1
Under Appeal | Qimonda AG Inotera Share Purchase Proceedings
Loss Contingencies [Line Items]
Percentage of total Inotera shares subject to litigation (in hundredths)	18.00%	18.00%
Loss contingency, judgment under appeal | $		$ 1
Under Appeal | Employee Class Action vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number	1	1