Stockholders' Equity Share Repurchase Program (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Number of shares authorized to be repurchased under stock repurchase program (in shares)	37,500,000
Number of shares repurchased and retired to date (in shares)	12,069,000
Cost of shares repurchased and retired to date	$ 200,400,000
Repurchase of common stock (in shares)	1,500	0	0
Repurchase of common stock	$ 19,000.0	$ 0	$ 0