Equity - Share Repurchase Program and Share Repurchase Activity (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Jul. 29, 2021	Apr. 30, 2021	Feb. 28, 2021	Dec. 31, 2015
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount		$ 2,000,000,000.0		$ 2,000,000,000.0					$ 1,200,000,000
Stock repurchase program, additional authorized amount							$ 500,000,000.0	$ 300,000,000.0
Stock repurchase program, remaining authorized repurchase amount		$ 300,000,000		$ 300,000,000
Number of shares repurchased (in shares)		3,094,706	5,999	5,369,416	423,706
Cash paid for repurchased shares		$ 684,900,000	$ 698,000	$ 1,083,350,000	$ 73,862,000
Treasury stock, average price paid per share (in dollars per share)		$ 218.33	$ 116.29	$ 202.28	$ 150.72
Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, additional authorized amount						$ 800,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 231,000,000
Open Market Purchases
Equity, Class of Treasury Stock [Line Items]
Cash paid for repurchased shares				$ 8,000,000.0	$ 10,000,000.0
Open Market Purchases | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Cash paid for repurchased shares	$ 10,800,000