Accrued Expenses and Other Liabilities (Schedule of Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2017
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable	$ 1,231	$ 516
Unfunded commitments for investment in qualified affordable housing projects	350	319
Employee compensation and benefits	255	255
Reserves for insurance losses and loss adjustment expenses	135	134	$ 139	$ 140
Cash collateral received from counterparties	61	41
Deferred revenue	26	27
Fair value of derivative contracts in payable position	3	37
Other liabilities	539	347
Total accrued expenses and other liabilities	$ 2,600	$ 1,676