Accrued Expenses And Other Payables (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Accrued Liabilities and Other Liabilities [Abstract]
Derivative Liability	$ 564	$ 651
Reinsurance Payable	104	479
Liability for Claims and Claims Adjustment Expense	260	373
Deferred Credits and Other Liabilities	570	1,065
Accrued expenses and other payables	1,050	1,414
Total accrued expenses and other payables	$ 2,548	$ 3,982