Variable Interest Entities - Assets and Liabilities Related to Non-consolidated VIEs and Maximum Exposure to Losses (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entity
Total Assets	$ 211,459	$ 211,116
Total Liabilities	191,282	188,906
Variable Interest Entity, Not Primary Beneficiary | CDC investments
Variable Interest Entity
Total Assets	1,683	1,705
Total Liabilities	529	580
Maximum Exposure	1,683	1,705
Variable Interest Entity, Not Primary Beneficiary | Private equity investments
Variable Interest Entity
Total Assets	143	133
Total Liabilities	0	0
Maximum Exposure	278	257
Variable Interest Entity, Not Primary Beneficiary | Loans provided to VIEs
Variable Interest Entity
Total Assets	3,668	3,386
Total Liabilities	0	0
Maximum Exposure	5,171	4,873
Variable Interest Entity, Not Primary Beneficiary | Lease pool entities
Variable Interest Entity
Total Assets	66	68
Total Liabilities	0	0
Maximum Exposure	$ 66	$ 68