Elpida Memories, Inc. (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended	0 Months Ended
	Feb. 27, 2014	Feb. 28, 2013	Feb. 27, 2014	Feb. 28, 2013	Feb. 27, 2014 Rexchip Electronics Corporation, now known as Micron Memory Taiwan Co., Ltd. [Member]	Jul. 31, 2013 Elpida Acquisition [Member]	Feb. 27, 2014 Elpida Acquisition [Member]	Aug. 29, 2013 Elpida Acquisition [Member]	Jul. 31, 2013 Elpida Acquisition [Member] Rexchip Electronics Corporation, now known as Micron Memory Taiwan Co., Ltd. [Member]
Business Acquisition [Line Items]
Cash paid for the Elpida Acquisition						$ 949
Rexchip Share Purchase Agreement [Abstract]
Ownership percentage after stock transactions during period (in hundredths)									89.00%
Minority interest decrease from purchase of interest, change in ownership percentage (in ten thousandths)					9.87%
Total net assets acquired						2,601
Noncontrolling interests in Elpida						168
Gain on acquisition of Elpida								1,484
Adjustment to gain on acquisition of Elpida	(33)	0	(33)	0			(33)
Business Acquisition, Pro Forma Information [Abstract]
Net sales		2,912		5,531
Net loss		(120)		(346)
Net loss attributable to Micron		$ (132)		$ (369)
Loss per share: [Abstract]
Basic (in dollars per share)		$ (0.13)		$ (0.36)
Diluted (in dollars per share)		$ (0.13)		$ (0.36)