Stockholders' Equity - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended				12 Months Ended
	Dec. 31, 2015	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 01, 2017	Jan. 11, 2016
Class of Stock [Line Items]
Preferred stock, shares authorized		50,000,000				50,000,000	50,000,000
Preferred stock, par value		$ 0.01				$ 0.01	$ 0.01
Preferred shares outstanding		0				0	0
Common stock, shares authorized		450,000,000				450,000,000	450,000,000
Common stock, par value		$ 0.01				$ 0.01	$ 0.01
Common stock, shares issued		151,985,067				151,985,067
Common stock, shares outstanding		144,984,050				144,984,050	143,938,280
Treasury stock, shares		7,001,017				7,001,017	6,812,784
Quarterly dividend declared		$ 0.06	$ 0.06	$ 0.06	$ 0.06	$ 0.24	$ 0.24	$ 0.23
Aggregated dividends declared						$ 35,000,000	$ 35,000,000	$ 37,000,000
Aggregate dividends paid						35,000,000	$ 35,000,000	$ 37,000,000
Treasury shares retired	18,100,000
Treasury stock retired, charge to additional paid-in capital	$ 346,000,000
Approved 2012 Program [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount										$ 1,700,000,000
Approved 2017 Program [Member]
Class of Stock [Line Items]
Stock Repurchase Program, Authorized Amount									$ 100,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 100,000,000				$ 100,000,000