Variable Interest Entities - Assets and Liabilities Related to Non-consolidated VIEs and Maximum Exposure to Losses (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Variable Interest Entity
Total Assets	$ 212,967	$ 207,452
Total Liabilities	196,423	190,125
Variable Interest Entity, Not Primary Beneficiary | CDC investments
Variable Interest Entity
Total Assets	1,953	1,856
Total Liabilities	667	653
Maximum Exposure	1,953	1,856
Variable Interest Entity, Not Primary Beneficiary | Private equity investments
Variable Interest Entity
Total Assets	222	186
Total Liabilities	0	0
Maximum Exposure	393	349
Variable Interest Entity, Not Primary Beneficiary | Loans provided to VIEs
Variable Interest Entity
Total Assets	4,011	4,374
Total Liabilities	0	0
Maximum Exposure	5,953	6,438
Variable Interest Entity, Not Primary Beneficiary | Lease pool entities
Variable Interest Entity
Total Assets	47	61
Total Liabilities	0	0
Maximum Exposure	47	61
Variable Interest Entity, Not Primary Beneficiary | Solar loan securitizations
Variable Interest Entity
Total Assets	9	10
Total Liabilities	0	0
Maximum Exposure	$ 9	$ 10