Variable Interest Entities - Assets and Liabilities Related to Non-consolidated VIEs and Maximum Exposure to Losses (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Variable Interest Entity
Total Assets	$ 214,318	$ 214,574
Total Liabilities	193,534	195,402
Variable Interest Entity, Not Primary Beneficiary | CDC investments
Variable Interest Entity
Total Assets	2,136	2,007
Total Liabilities	751	690
Maximum Exposure	2,178	2,054
Variable Interest Entity, Not Primary Beneficiary | Private equity investments
Variable Interest Entity
Total Assets	268	230
Total Liabilities	0	0
Maximum Exposure	484	400
Variable Interest Entity, Not Primary Beneficiary | Loans provided to VIEs
Variable Interest Entity
Total Assets	4,411	4,274
Total Liabilities	0	0
Maximum Exposure	6,883	6,395
Variable Interest Entity, Not Primary Beneficiary | Lease pool entities
Variable Interest Entity
Total Assets	33	42
Total Liabilities	0	0
Maximum Exposure	33	42
Variable Interest Entity, Not Primary Beneficiary | Solar loan securitizations
Variable Interest Entity
Total Assets	8	9
Total Liabilities	0	0
Maximum Exposure	$ 8	$ 9