Variable Interest Entities - Consolidated VIEs (Details) $ in Millions	Jun. 30, 2021 USD ($) investment	Dec. 31, 2020 USD ($)	Jun. 30, 2020 USD ($)
Variable Interest Entities
Interest bearing deposits in banks	$ 14,991	$ 14,309
Assets
Other Assets	9,898	9,916
Total assets	165,297	167,846	$ 167,350
Liabilities
Other Liabilities	3,246	2,906
Total liabilities	147,707	150,567
Consolidated VIEs
Assets
Loans Held for Investment, Net	281	310
Other Assets	183	192
Total assets	464	502
Liabilities
Other Liabilities	16	21
Total liabilities	16	21
Consolidated VIEs | LIHC investments
Assets
Loans Held for Investment, Net	0	0
Other Assets	74	81
Total assets	74	81
Liabilities
Other Liabilities	14	16
Total liabilities	$ 14	16
Number of LIHC investment fund | investment	2
Consolidated VIEs | Leasing investments
Assets
Loans Held for Investment, Net	$ 281	310
Other Assets	109	111
Total assets	390	421
Liabilities
Other Liabilities	2	5
Total liabilities	$ 2	$ 5