Accrued Expenses and Other Liabilities (Schedule of Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable	$ 580	$ 516
Unfunded commitments for investment in qualified affordable housing projects	322	319
Employee compensation and benefits	197	255
Reserves for insurance losses and loss adjustment expenses	153	134	$ 149	$ 140
Cash collateral received from counterparties	38	41
Deferred revenue	28	27
Fair value of derivative contracts in payable position	4	37
Other liabilities	585	347
Total accrued expenses and other liabilities	$ 1,907	$ 1,676