Commitments, Contingencies, And Guarantees (Narrative) (Detail) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Financial Instruments Owned and Pledged as Collateral [Line Items]
Derivative liability subject to a master netting agreement	$ 107	$ 123
Repurchase agreements	1,406	1,406
Purchase Commitment, Remaining Minimum Amount Committed	622
Carrying value of limited partnerships and partially-owned investment companies included in other investments	10,700	9,800
Funding commitments relating to limited partnerships and partially-owned investment companies	7,200	7,200
Unrecognized tax benefits	64
Operating Lease, Right-of-Use Asset	437	445
Operating Lease, Liability	$ 470	$ 484
Operating Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities	Other Liabilities
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets