Variable Interest Entities - Assets and Liabilities Related to Non-consolidated VIEs and Maximum Exposure to Losses (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Variable Interest Entity
Total Assets	$ 212,669	$ 212,927
Total Liabilities	192,266	193,282
Variable Interest Entity, Not Primary Beneficiary | CDC investments
Variable Interest Entity
Total Assets	2,183	2,179
Total Liabilities	720	741
Maximum Exposure	2,230	2,224
Variable Interest Entity, Not Primary Beneficiary | Private equity investments
Variable Interest Entity
Total Assets	281	268
Total Liabilities	0	0
Maximum Exposure	498	487
Variable Interest Entity, Not Primary Beneficiary | Loans provided to VIEs
Variable Interest Entity
Total Assets	4,588	4,711
Total Liabilities	0	0
Maximum Exposure	7,482	7,529
Variable Interest Entity, Not Primary Beneficiary | Lease pool entities
Variable Interest Entity
Total Assets	28	30
Total Liabilities	0	0
Maximum Exposure	28	30
Variable Interest Entity, Not Primary Beneficiary | Solar loan securitizations
Variable Interest Entity
Total Assets	8	8
Total Liabilities	0	0
Maximum Exposure	$ 8	$ 8