Commitments, Guarantees and Contingencies - Funding Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Commitments
Funding commitments	$ 1,014	$ 399
Commercial mortgage loans
Commitments
Funding commitments	48	18
Affordable housing and other real estate partnerships
Commitments
Funding commitments	9	12
Property funds
Commitments
Funding commitments	38	17
Private funds
Commitments
Funding commitments		9
Pledged asset lines of credit
Commitments
Funding commitments	$ 919	342
Consumer lines of credit
Commitments
Funding commitments		$ 1