Accrued Expenses and Other Liabilities (Schedule of Accrued Expenses and Other Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Accounts Payable and Accrued Liabilities [Abstract]
Accounts Payable	$ 1,082	$ 391
Liability for Claims and Claims Adjustment Expense	184	169
Accrued Employee Benefits	158	242
Cash and securities collateral placed with counterparties	126	82
Derivative Liability, Fair Value, Gross Liability	124	145
Deferred Revenue	93	108
Other Accrued Liabilities	418	408
Accrued expenses and other liabilities	$ 2,185	$ 1,545