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Supplemental Balance Sheet Information (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Other current liabilities    
Accrued payroll and employee benefits $ 207 $ 182
Accrued interest 169 184
Accrued taxes, other than income 73 69
Finance lease liability 35  
Operating lease liability 13  
Deferred revenues 100 87
Contingent liabilities 180 213
Other 4 11
Total other current liabilities 781 746
Other long-term liabilities    
Postemployment benefit plan obligations 346 355
Finance lease noncurrent 444  
Operating leases noncurrent 116  
Income taxes payable 179 476
Deferred revenues 429 399
Construction contract intangible liability   132
Other 41 62
Total other long-term liabilities $ 1,555 $ 1,424