Variable Interest Entities - Schedule of Variable Interest Entities Information (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Variable Interest Entity [Line Items]
Total Assets	$ 187,409	$ 187,168
Total Liabilities	167,307	168,992
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	557	733
Total Liabilities	0	1
Variable Interest Entity, Not Primary Beneficiary | LIHTC investments
Variable Interest Entity [Line Items]
Total Assets	11,249	9,901
Total Liabilities	5,057	4,468
Maximum Exposure to Loss	2,972	2,996
Variable Interest Entity, Not Primary Beneficiary | Indirect investments
Variable Interest Entity [Line Items]
Total Assets	1,836	2,352
Total Liabilities	3	3
Maximum Exposure to Loss	$ 12	$ 15