Revenue and Related Matters - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Assets:
Fees receivable, gross	$ 1,148,563		$ 1,148,563		$ 1,565,786
Contract assets recorded in Prepaid expenses and other current assets	32,754		32,754		21,183
Contract liabilities:
Deferred revenues (current liability)	2,394,556		2,394,556		2,443,762
Non-current deferred revenues recorded in Other liabilities	26,757		26,757		39,115
Total contract liabilities	2,421,313		2,421,313		$ 2,482,877
Revenue recognized previously attributable to deferred revenues	$ 1,000,000	$ 900,000	$ 1,900,000	$ 1,800,000