Accrued Expenses and Other Long-Term Liabilities (Details) - USD ($)		Dec. 31, 2019	Dec. 31, 2018
Accrued Expenses
Operating lease liabilities, current		$ 331,000,000
Defined benefit plan liabilities, current		37,000,000	$ 43,000,000
Environmental liabilities, current		27,000,000	29,000,000
Wage and other employee-related liabilities, current		292,000,000	302,000,000
Accrued interest expense, current		83,000,000	93,000,000
Contract liabilities from contracts with customers, current		55,000,000	31,000,000
Environmental credit obligations, current		31,000,000	34,000,000
Other accrued liabilities, current		93,000,000	98,000,000
Accrued expenses		949,000,000	630,000,000
Other Long-Term Liabilities
Operating lease liabilities, noncurrent		959,000,000
Liability for unrecognized tax benefits, noncurrent		954,000,000	721,000,000
Defined benefit plan liabilities, noncurrent		834,000,000	654,000,000
Repatriation tax liability, noncurrent	[1]	508,000,000	603,000,000
Environmental liabilities, noncurrent		319,000,000	327,000,000
Wage and other employee-related liabilities, noncurrent		121,000,000	109,000,000
Other accrued liabilities, noncurrent		192,000,000	453,000,000
Other long-term liabilities		3,887,000,000	2,867,000,000
Accrued Expenses and Other Long-Term Liabilities (Textual)
Current portion of repatriation tax liability, included in income taxes payable		$ 54,000,000	$ 0

[1] The current portion of repatriation tax liability is included in income taxes payable. As of December 31, 2019, the current portion of repatriation tax liability was $54 million. There was no current portion of repatriation tax liability as of December 31, 2018.