Treasury Stock (Details) - USD ($)		1 Months Ended	3 Months Ended		6 Months Ended
	Jan. 30, 2020	Aug. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jan. 31, 2020
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount							$ 1,000,000,000.00
Available to repurchase common stock			$ 625,600,000		$ 625,600,000
Amount expended on share repurchases in open market transactions						$ 199,903,000
Number of shares withheld to satisfy minimum tax withholding obligations (in shares)			393,837	256,376	729,184	739,600
Payment for tax withholding related to vested stock units			$ 55,000,000.0	$ 35,800,000	$ 101,700,000	$ 101,200,000
ASR Counterparty [Member]
Equity, Class of Treasury Stock [Line Items]
Amount expended on share repurchases in open market transactions	$ 1,000,000,000.00
Stock repurchases net (shares)	6,500,000	800,000
Open Market Purchases [Member]
Equity, Class of Treasury Stock [Line Items]
Amount expended on share repurchases in open market transactions			$ 0	$ 0	$ 0	$ 199,900,000
Stock repurchases net (shares)						1,731,500
Average per share price on share repurchases in open market transactions (in dollars per share)						$ 115.45