Variable Interest Entities - Summary of Variable Interest Entities Information (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Total Assets	$ 181,221	$ 186,346
Total Liabilities	165,913	168,923
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Total Assets	2,523	2,827
Total Liabilities	1	1
Variable Interest Entity, Not Primary Beneficiary | LIHTC investments
Variable Interest Entity [Line Items]
Total Assets	7,816	7,839
Total Liabilities	3,265	3,252
Maximum Exposure to Loss	2,005	1,985
Variable Interest Entity, Not Primary Beneficiary | Principal Investments, Indirect
Variable Interest Entity [Line Items]
Total Assets	8,277	8,437
Total Liabilities	232	178
Maximum Exposure to Loss	$ 55	$ 57