Revenue and Related Matters - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Assets:
Fees receivable, gross	$ 1,574,960		$ 1,610,228
Contract assets recorded in Prepaid expenses and other current assets	29,773		28,791
Contract liabilities:
Deferred revenues (current liability)	2,796,016		2,640,515
Non-current deferred revenues recorded in Other liabilities	24,523		33,490
Total contract liabilities	2,820,539		$ 2,674,005
Revenue recognized previously attributable to deferred revenues	$ 1,000,000	$ 900,000