Revenue and Related Matters - Schedule of Contract with Customer, Asset and Liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Assets:
Fees receivable, gross	$ 1,413,321		$ 1,413,321		$ 1,610,228
Contract assets recorded in Prepaid expenses and other current assets	29,773		29,773		28,791
Contract liabilities:
Deferred revenues (current liability)	2,626,511		2,626,511		2,640,515
Non-current deferred revenues recorded in Other liabilities	25,082		25,082		33,490
Total contract liabilities	2,651,593		2,651,593		$ 2,674,005
Revenue recognized previously attributable to deferred revenues	$ 1,200,000	$ 1,200,000	$ 1,700,000	$ 1,600,000