Accrued Expenses and Other Liabilities (Schedule of Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2018
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable	$ 1,761	$ 535
Unfunded commitments for investment in qualified affordable housing projects	455	372
Employee compensation and benefits	271	296
Reserves for insurance losses and loss adjustment expenses	125	122	$ 135	$ 134
Deferred revenue	89	36
Net deferred tax liabilities	27	67
Cash collateral received from counterparties	17	48
Fair value of derivative contracts in payable position	4	5
Other liabilities	572	491
Total accrued expenses and other liabilities	$ 3,321	$ 1,972