Contingencies, Commitments and Guarantees - Lease Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Lease liability, balance sheet location	Other liabilities	Other liabilities
Right of use asset, balance sheet location	Other assets	Other assets
Lease liabilities	$ 1,051	$ 1,200
Right of use asset	880	1,000
Operating Lease, Lease Income, Lease Payments	$ 205	231
Leases, weighted average discount rate	2.96%
Leases, weighted average lease term	10 years 4 months 24 days
Rent expense	$ 190	$ 237	$ 258