Stockholders' Equity - Narrative (Details) - USD ($) shares in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Nov. 30, 2018
Class of Stock [Line Items]
Stock repurchase program, authorized amount					$ 1,100,000,000
Repurchases of common stock			$ 121,078,000	$ 291,788,000
Amortization expense from capitalized stock-based compensation	$ 7,100,000	$ 7,500,000	$ 21,900,000	$ 22,900,000
Common Stock
Class of Stock [Line Items]
Shares repurchased during period (in shares)	0.1		1.3
Repurchases of common stock	$ 13,200,000		$ 121,100,000