Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions		1 Months Ended	3 Months Ended			9 Months Ended
	Feb. 01, 2017	Nov. 30, 2016	Dec. 30, 2016	Apr. 01, 2016	Jan. 01, 2016	Dec. 30, 2016	Nov. 30, 2016	Jan. 01, 2016	Nov. 20, 2016	Mar. 31, 2016
Class of Stock [Line Items]
Dividends declared per common share (in usd per share)			$ 0.075		$ 0.15	$ 0.225		$ 0.45
Authorization to repurchase common stock, increase									$ 510,000,000
Authorization to repurchase common stock through March 31, 2017									500,000,000
Authorization to repurchase common stock									$ 1,300,000,000.0
Payments for repurchases of common stock						$ 0		$ 868,000,000
March 2016 Accelerated Stock Repurchase Agreement
Class of Stock [Line Items]
Authorization to repurchase common stock										$ 1,000,000,000.0
Payments for repurchases of common stock				$ 1,000,000,000
Repurchases of common stock (in shares)		6.5		42.4			48.9
Average price paid per share (in usd per share)							$ 20.44
Subsequent Event | Common Stock
Class of Stock [Line Items]
Dividends payable, date declared	Feb. 01, 2017
Dividends declared per common share (in usd per share)	$ 0.075
Dividends payable, date to be paid	Mar. 15, 2017
Dividends payable, date of record	Feb. 20, 2017