Intangible Assets - Finite-lived Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets - Remaining Weighted-Average Estimated Useful Life	5 years 4 months 24 days	6 years 1 month 6 days
Finite-lived intangible assets - Gross Carrying Amount	$ 1,298	$ 1,207
Finite-lived intangible assets - Accumulated Amortization	618	483
Total	$ 680	$ 724
Management Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets - Remaining Weighted-Average Estimated Useful Life	3 years 8 months 12 days	2 years 10 months 24 days
Finite-lived intangible assets - Gross Carrying Amount	$ 244	$ 177
Finite-lived intangible assets - Accumulated Amortization	156	130
Total	$ 88	$ 47
Investor/Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets - Remaining Weighted-Average Estimated Useful Life	6 years	7 years
Finite-lived intangible assets - Gross Carrying Amount	$ 785	$ 746
Finite-lived intangible assets - Accumulated Amortization	338	254
Total	$ 447	$ 492
Technology-Related [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets - Remaining Weighted-Average Estimated Useful Life	4 years 7 months 6 days	4 years 7 months 6 days
Finite-lived intangible assets - Gross Carrying Amount	$ 260	$ 261
Finite-lived intangible assets - Accumulated Amortization	118	81
Total	$ 142	$ 180
Trade Names / Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets - Remaining Weighted-Average Estimated Useful Life	1 year 9 months 18 days	2 years 7 months 6 days
Finite-lived intangible assets - Gross Carrying Amount	$ 9	$ 23
Finite-lived intangible assets - Accumulated Amortization	6	18
Total	$ 3	$ 5