Variable Interest Entities - Schedule of Variable Interest Entities Information (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Total Assets	$ 187,450	$ 188,281
Total Liabilities	172,661	173,644
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	913	1,149
Total Liabilities	1	1
Variable Interest Entity, Not Primary Beneficiary | LIHTC investments
Variable Interest Entity [Line Items]
Total Assets	9,601	8,904
Total Liabilities	4,406	3,848
Maximum Exposure to Loss	2,608	2,768
Variable Interest Entity, Not Primary Beneficiary | Indirect investments
Variable Interest Entity [Line Items]
Total Assets	2,492	2,741
Total Liabilities	3	91
Maximum Exposure to Loss	$ 17	$ 18