Stock Repurchases Tender Offer (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock (in shares)	13,877	16,477	41,020
Value of treasury stock acquired	$ 1,546,016	$ 1,446,767	$ 2,402,475
Treasury stock acquired, average cost per share	$ 111.41	$ 87.80	$ 58.57
Open Market Purchases
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock (in shares)	13,877	8,495	19,218
Value of treasury stock acquired	$ 1,546,016	$ 741,850	$ 1,168,321
Treasury stock acquired, average cost per share	$ 111.41	$ 87.32	$ 60.79
Tender Offer
Equity, Class of Treasury Stock [Line Items]
Repurchase of common stock (in shares)	0	7,982	21,802
Value of treasury stock acquired	$ 0	$ 704,917	$ 1,234,154
Treasury stock acquired, average cost per share	$ 0	$ 88.32	$ 56.61
Treasury Stock, Shares Repurchases, Table Footnotes:
Treasury Stock Acquired, Average Cost Per Share, Clearing Price		$ 88.00	$ 56.50
Share Repurchase Fees And Expenses		$ 2,529	$ 2,343