Accrued Expenses and Other Liabilities (Schedule of Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Accounts Payable and Accrued Liabilities [Abstract]
Accounts Payable	$ 497	$ 391
Accrued Employee Benefits	196	242
Liability for Claims and Claims Adjustment Expense	164	169
Cash and securities collateral placed with counterparties	146	82
Derivative Liability, Fair Value, Gross Liability	87	145
Deferred Revenue	78	108
Other Accrued Liabilities	424	408
Accrued expenses and other liabilities	$ 1,592	$ 1,545