Accrued Expenses and Other Liabilities (Schedule of Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable	$ 1,296	$ 602
Unfunded commitments for investment in qualified affordable housing projects	729	525
Employee compensation and benefits	450	316
Operating lease liabilities	175	187
Deferred revenue	169	104
Reserves for insurance losses and loss adjustment expenses	125	129	$ 125	$ 122
Fair value of derivative contracts in payable position	61	33
Net deferred tax liabilities	13	92
Cash collateral received from counterparties	8	6
Other liabilities	520	440
Total accrued expenses and other liabilities	$ 3,546	$ 2,434
Operating lease, liability, statement of financial position [Extensible List]	Total accrued expenses and other liabilities	Total accrued expenses and other liabilities