Stock-based Compensation Expense and Share Repurchase Programs - Additional Information (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Jun. 23, 2021	Dec. 31, 2020	Nov. 30, 2020	Dec. 31, 2019
Equity, Class of Treasury Stock [Line Items]
Amount of shares repurchased	$ 642,273,000		$ 108,007,000	$ 1,067,225,000	$ 408,033,000
Share Repurchase Program 2019
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to be repurchased							$ 500,000,000		$ 500,000,000
Shares repurchased (in shares)					1,806,587
Amount of shares repurchased					$ 408,000,000
Share Repurchase Program 2020
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to be repurchased								$ 500,000,000
Shares repurchased (in shares)		1,988,941
Amount of shares repurchased		$ 424,900,000
Share Repurchase Program 2021
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized to be repurchased						$ 1,500,000,000
Shares repurchased (in shares)	3,293,161
Amount of shares repurchased	$ 642,200,000
Stock repurchase program, remaining amount	$ 857,800,000			$ 857,800,000