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Accounts Payable and Accrued Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Accounts Payable and Accrued Liabilities, Current [Abstract]    
Salaries and incentives $ 379 $ 325
Accrued benefits and payroll taxes 98 114
Trade accounts payable and other accrued liabilities 512 564
Accrued interest payable 89 62
Taxes other than income tax 62 65
Capco acquisition related liabilities 6 66
Total accounts payable and accrued liabilities $ 1,146 $ 1,196