Stockholders' Equity - Additional Information (Details) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Jan. 11, 2016	Jul. 30, 2014
Equity [Abstract]
Cash dividends declared per share	$ 0.06	$ 0.05
Stock Repurchase Program, Authorized Amount			$ 1,700,000,000	$ 1,400,000,000
Cash spent under share repurchase program	$ 28,000,000	$ 63,000,000
Shares repurchased during period	2,264,692
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 272,000,000