Contingencies (Details) ¥ in Millions, $ in Millions			6 Months Ended		12 Months Ended
	Mar. 09, 2022 complaint	Mar. 07, 2022 complaint	Mar. 03, 2022 CNY (¥) complaint patent	Mar. 03, 2022 USD ($) complaint patent	Aug. 30, 2018
Securities Matters | Pending Litigation
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number			2	2
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
Innovative Memory Solutions, Inc. vs Micron-Complaint 1 | Patent Matters | Pending Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent			2	2
Loss Contingency, Pending Claims, Number			1	1
Fujian Jinhua Integrated Circuit Co., Ltd. vs Micron-Complaint 1 | Patent Matters | Pending Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent			1	1
Loss Contingency, Pending Claims, Number			1	1
Damages sought on alleged patent infringement | ¥			¥ 98
Fujian Jinhua Integrated Circuit Co., Ltd. vs Micron-Complaint 2 | Patent Matters | Pending Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent			1	1
Loss Contingency, Pending Claims, Number			1	1
Damages sought on alleged patent infringement | ¥			¥ 98
United Microelectronics Corporation vs Micron-Complaint 1 | Patent Matters | Withdrawn Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent			1	1
Loss Contingency, Claims Dismissed, Number			1	1
Damages sought on alleged patent infringement | ¥			¥ 90
United Microelectronics Corporation vs Micron-Complaint 2 | Patent Matters | Withdrawn Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent			1	1
Loss Contingency, Claims Dismissed, Number			1	1
Damages sought on alleged patent infringement | ¥			¥ 90
Fuzhou Court Preliminary Injunction | Patent Matters | Pending Litigation
Loss Contingencies [Line Items]
Percent of annualized revenue derived from impacted products					1.00%
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
Flash-Control, LLC vs Micron | Patent Matters | Pending Litigation
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number			1	1
Netlist Inc. vs Micron | Patent Matters | Pending Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent			1	1
Loss Contingency, Pending Claims, Number			1	1
Netlist Inc vs Micron - Complaint 2 | Patent Matters | Pending Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent			3	3
Loss Contingency, Pending Claims, Number			1	1
Vervain LLC vs Micron | Patent Matters | Pending Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed | patent			4	4
Loss Contingency, Pending Claims, Number			1	1
Qimonda AG Inotera Share Purchase Proceedings | Under Appeal
Loss Contingencies [Line Items]
Percentage of total Inotera shares subject to litigation (in hundredths)			18.00%	18.00%
Loss contingency, judgment under appeal | $				$ 1
Claims on Behalf of Indirect Purchasers | Antitrust Matters | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number		1
Subsequent indirect DRAM Purchasers United States vs Micron | Antitrust Matters | Dismissed Litigation
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number			2	2
Subsequent direct DRAM Purchasers United States vs Micron | Antitrust Matters | Dismissed Litigation
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number			4	4
Claims on Behalf of Direct Purchasers | Antitrust Matters | Under Appeal
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number			1	1
DRAM Purchasers Canada vs Micron | Antitrust Matters | Pending Litigation
Loss Contingencies [Line Items]
Loss Contingency, Pending Claims, Number			6	6
Employee Class Action vs Micron | Subsequent Event
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number	1
Allied Telesis K.K. vs Micron
Loss Contingencies [Line Items]
Loss Contingency, Claims Dismissed, Number			1	1