Equity - Treasury Stock (Details) - Inotera - USD ($) shares in Millions, $ in Millions		3 Months Ended
	Dec. 06, 2016	Mar. 02, 2017
Class of Stock [Line Items]
Cash proceeds received from issuance of Micron Shares to Nanya	$ 986
Private Placement
Class of Stock [Line Items]
Number of Micron Shares issued to Nanya as consideration for Inotera shares not already owned (in shares)	58
Cash proceeds received from issuance of Micron Shares to Nanya	$ 986
Private Placement | Treasury Stock, Common
Class of Stock [Line Items]
Cash proceeds received from issuance of Micron Shares to Nanya	$ 925
Treasury shares included in sale of shares to Nanya	54
Decrease in treasury stock as a result of the issuance of shares to Nanya		$ 1,030
Decrease in retained earnings due to reissuance of treasury shares at price lower than purchase price		$ 104