Revenue and Related Matters - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Assets:
Fees receivable, gross	$ 1,181,496		$ 1,181,496		$ 1,371,680
Contract assets recorded in Prepaid expenses and other current assets	26,666		26,666		20,054
Contract liabilities:
Deferred revenues (current liability)	2,396,143		2,396,143		2,238,035
Non-current deferred revenues recorded in Other liabilities	35,656		35,656		48,176
Total contract liabilities	2,431,799		2,431,799		$ 2,286,211
Revenue recognized previously attributable to deferred revenues	$ 956,400	$ 817,300	$ 1,400,000	$ 1,300,000