Stockholders' Equity - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Jan. 31, 2018
Schedule Of Capitalization Equity [Line Items]
Repurchase of common stock, shares	0	0	4,707,450	0
Aggregate cost of shares repurchased, common stock			$ 115,000,000
Average price of shares repurchased, common stock			$ 24.32
Remaining authorized share repurchased amount	$ 75,000,000		$ 75,000,000		$ 190,000,000
Treasury stock, shares	18,844,614		18,844,614		14,116,534
Aggregate cost of treasury stock	$ 722,000,000		$ 722,000,000		$ 607,000,000
Maximum
Schedule Of Capitalization Equity [Line Items]
Repurchase of shares of common stock authorized						$ 250,000,000