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Commitments and Contingent Liabilities - Schedule of Current and Long-term Components of Accrued Environmental Remediation Liabilities and Balance Sheet Locations (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Environmental Remediation [Line Items]    
Current accrued liabilities $ 95 $ 74
Long-term accrued liabilities 295 332
Total environmental remediation 390 406
Other Accrued Liabilities [Member]    
Environmental Remediation [Line Items]    
Current accrued liabilities 95 74
Other Liabilities [Member]    
Environmental Remediation [Line Items]    
Long-term accrued liabilities 295 332
Fayetteville Works, Fayetteville, North Carolina [Member]    
Environmental Remediation [Line Items]    
Total environmental remediation 194 201
Fayetteville Works, Fayetteville, North Carolina [Member] | Other Accrued Liabilities [Member]    
Environmental Remediation [Line Items]    
Current accrued liabilities 39 20
Fayetteville Works, Fayetteville, North Carolina [Member] | Other Liabilities [Member]    
Environmental Remediation [Line Items]    
Long-term accrued liabilities $ 155 $ 181