Shareholder's equity (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Feb. 09, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 17, 2021	Dec. 10, 2020
Stock repurchases
Repurchase of common stock (in shares)		13,877,000	16,477,000	41,020,000
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
Terminated Remaining Prior Share Repurchases Authorized, Amount						$ 329,302
Stock Repurchase Program, Authorized Amount					$ 2,000,000	$ 2,000,000
Charter documents and Delaware law:
Preferred stock, shares authorized (in shares)		5,000,000	5,000,000
Period During Which The Company Is Subject To Section 203 Of The Delaware General Corporation Law Limitation		3 years
Payments to Noncontrolling Interests		$ 20,104	$ 7,831	$ 68,019
Treasury stock
Stock repurchases
Repurchase of common stock (in shares)		13,877,000	16,477,000	41,020,000
Value of treasury stock acquired		$ 1,546,016	$ 1,446,767	$ 2,402,475
Retirement of treasury stock (in shares)		13,877,000	16,477,000	41,020,000
Subsequent Event
Stock repurchases
Repurchase of common stock (in shares)	1,437,000
Value of treasury stock acquired	$ 159,133
Treasury stock acquired, average cost per share	$ 110.73
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 2,224,806