Stockholders' Equity - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Aug. 10, 2018	May 02, 2018
Stockholders Equity Noncontrolling Interests and Income (Loss) Per Share [Abstract]
Stock Repurchase Program, Authorized Amount				$ 750,000,000	$ 500,000,000
Treasury Stock, Shares, Acquired (in shares)	0	31,000,000
Repurchase of common stock	$ 0	$ 311,000,000	$ 0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 439,000,000