Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment per unit value, minimum	$ 1,000	$ 1,000
Property, plant and equipment, estimated useful life		1 year
Depreciation		$ (504,000,000)	$ (527,800,000)	$ (502,600,000)
Net income		$ 547,629,000	$ 523,672,000	$ 651,642,000
Basic (in dollars per share)		$ 3.59	$ 3.29	$ 4.01
Diluted (in dollars per share)		$ 3.52	$ 3.26	$ 3.93
Software And Hardware
Property, Plant and Equipment [Line Items]
Estimated Useful Life (in years)	6 years	6 years	5 years
Service Life
Property, Plant and Equipment [Line Items]
Depreciation		$ 62,700,000
Net income		$ 52,300,000
Basic (in dollars per share)		$ 0.34
Diluted (in dollars per share)	$ 0.34