Accrued Expenses And Other Payables (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Accrued Liabilities and Other Liabilities [Abstract]
Derivative Liability	$ 621	$ 761
Employee-related Liabilities	283	337
Accrued Income Taxes, Current	64	0
Accrual for Taxes Other than Income Taxes, Current	112	98
Reinsurance Payable	9	15
Liability for Claims and Claims Adjustment Expense	297	277
Contract with Customer, Liability	477	501
Accrued expenses and other payables	1,135	924
Total accrued expenses and other payables	$ 2,998	$ 2,913