Accrued Expenses And Other Payables (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Unrealized losses on derivative contracts	$ 605	$ 926
Reinsurance Payable	425	352
Liability for Claims and Claims Adjustment Expense	459	376
Deferred Credits and Other Liabilities	1,152	1,684
Other accruals and payables	1,472	1,702
Total accrued expenses and other payables	$ 4,113	$ 5,040