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Commitments and Contingencies (Details 1) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Environmental Commitments and Contingencies (Amounts in Paragraphs)    
Amounts accrued for probable environmental remediation costs $ 531 $ 461
Loss Contingency, Range of Possible Loss, Portion Not Accrued 448 374
Recorded Third-Party Environmental Recoveries, Amount 436 $ 343
Financial Arrangements (Amounts in Paragraph)    
Unused standby letters of credit and bank guarantees 498  
Surety Bond Outstanding 182  
Other Current Liabilities [Member]    
Environmental Commitments and Contingencies (Amounts in Paragraphs)    
Amounts accrued for probable environmental remediation costs 148  
Other Noncurrent Liabilities [Member]    
Environmental Commitments and Contingencies (Amounts in Paragraphs)    
Amounts accrued for probable environmental remediation costs 383  
Prepaid Expenses and Other Current Assets [Member]    
Environmental Commitments and Contingencies (Amounts in Paragraphs)    
Recorded Third-Party Environmental Recoveries, Amount 119  
Other Noncurrent Assets [Member]    
Environmental Commitments and Contingencies (Amounts in Paragraphs)    
Recorded Third-Party Environmental Recoveries, Amount $ 317