Stockholders' Equity - Stock Repurchase Program (Details) - USD ($) shares in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Feb. 29, 2020
Stockholders' Equity Note [Abstract]
Stock repurchase program, authorized amount			$ 600,000,000
Stock repurchased and retired during period (in shares)	1.8	9.2
Stock repurchased and retired during period, aggregate purchase price	$ 37,500,000	$ 177,300,000