Commitments and Contingencies - Narrative (Details) $ in Millions		3 Months Ended			9 Months Ended
	Feb. 02, 2021 plaintiff	Sep. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Period of lease extension options		15 years			15 years
Option to terminate lease, period					1 year
Lease impairment		$ 3		$ 73	$ 14	$ 98
Revenue		$ 3,084		2,861	$ 9,345	8,244
Basis Capital Investment Group, Investment Losses on Collateralized Debt Obligations
Loss Contingencies [Line Items]
Number of entities | plaintiff	2
Amazon Web Services
Loss Contingencies [Line Items]
Collaborative arrangement, purchase obligation			$ 1,000
Collaborative arrangement, contractual period			5 years
CME Group
Loss Contingencies [Line Items]
Noncontrolling interest ownership by noncontrolling owners percentage		27.00%			27.00%
S&P DJ Indices | CME Group
Loss Contingencies [Line Items]
Noncontrolling interest ownership by noncontrolling owners percentage		27.00%			27.00%
S&P DJ Indices | Related Party
Loss Contingencies [Line Items]
Revenue		$ 43		$ 42	$ 132	$ 130
Minimum
Loss Contingencies [Line Items]
Remaining lease terms		1 year			1 year
Maximum
Loss Contingencies [Line Items]
Remaining lease terms		10 years			10 years