Variable Interest Entities - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) investment	Dec. 31, 2020 USD ($)
Variable Interest Entity
Assets	$ 211,116	$ 204,680
LLCs designed for the purpose of purchasing pools of residual interests in leases
Variable Interest Entity
Number of co-investments | investment	3
Ownership percentage	50.00%
Variable Interest Entity, Not Primary Beneficiary | Loans provided to VIEs
Variable Interest Entity
Unfunded commitment amounts	$ 1,500	1,200
Variable Interest Entity, Not Primary Beneficiary | CDC investments
Variable Interest Entity
Assets	1,705	1,546
Variable Interest Entity, Not Primary Beneficiary | CDC investments | Qualified Affordable Housing Tax Credits
Variable Interest Entity
Assets	1,400	1,300
Unfunded commitments in qualifying LIHTC investments	573	478
Variable Interest Entity, Not Primary Beneficiary | Private equity investments
Variable Interest Entity
Assets	133	117
Unfunded commitment amounts	124	83
Capital contribution to private equity investments	$ 17	$ 19