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Commitments and Contingent Liabilities - Schedule of Current and Long-term Components of Environmental Remediation Liabilites and Balance Sheet Locations (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Environmental Remediation [Line Items]    
Current environmental remediation $ 95 $ 74
Long-term environmental remediation 295 332
Total environmental remediation 390 406
Other Accrued Liabilities [Member]    
Environmental Remediation [Line Items]    
Current environmental remediation 95 74
Other Liabilities [Member]    
Environmental Remediation [Line Items]    
Long-term environmental remediation $ 295 $ 332