Accrued Expenses and Other Liabilities (Schedule of Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Accounts Payable and Accrued Liabilities [Abstract]
Accounts Payable	$ 781	$ 391
Accrued Employee Benefits	218	242
Liability for Claims and Claims Adjustment Expense	150	169
Cash and securities collateral placed with counterparties	113	82
Deferred Revenue	66	108
Derivative Liability, Fair Value, Gross Liability	46	145
Other Accrued Liabilities	424	408
Accounts Payable and Accrued Liabilities	$ 1,798	$ 1,545