Accrued Expenses and Other Liabilities (Schedule of Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Accounts Payable and Accrued Liabilities [Abstract]
Accounts payable	$ 347	$ 516
Unfunded commitments for investment in qualified affordable housing projects	336	319
Employee compensation and benefits	165	255
Reserves for insurance losses and loss adjustment expenses	135	134	$ 157	$ 140
Deferred revenue	28	27
Cash collateral received from counterparties	27	41
Fair value of derivative contracts in a payable position	21	37
Other liabilities	663	347
Total accrued expenses and other liabilities	$ 1,722	$ 1,676