Variable Interest Entities - Assets and Liabilities Related to Non-consolidated VIEs and Maximum Exposure to Losses (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Variable Interest Entity
Total Assets	$ 212,927	$ 214,574
Total Liabilities	193,282	195,402
Variable Interest Entity, Not Primary Beneficiary | CDC investments
Variable Interest Entity
Total Assets	2,179	2,007
Total Liabilities	741	690
Maximum Exposure	2,224	2,054
Variable Interest Entity, Not Primary Beneficiary | Private equity investments
Variable Interest Entity
Total Assets	268	230
Total Liabilities	0	0
Maximum Exposure	487	400
Variable Interest Entity, Not Primary Beneficiary | Loans provided to VIEs
Variable Interest Entity
Total Assets	4,711	4,274
Total Liabilities	0	0
Maximum Exposure	7,529	6,395
Variable Interest Entity, Not Primary Beneficiary | Lease pool entities
Variable Interest Entity
Total Assets	30	42
Total Liabilities	0	0
Maximum Exposure	30	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