Capital Transactions - Repurchase Programs (Details) - USD ($)				12 Months Ended
	May 26, 2017	May 27, 2016	May 29, 2015	Dec. 31, 2017	Dec. 31, 2013	Feb. 02, 2017
Equity, Class of Treasury Stock [Line Items]
Repurchase of shares of common stock (in shares)					429,000,000
Dividend equivalent payment	$ 0	$ 3,000,000	$ 3,000,000
Share Repurchase Program 2017
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, dollar amount authorized						$ 1,000,000,000
Cost of common stock repurchased under the stock repurchase program				$ 0
Repurchase of shares of common stock (in shares)				0