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Contingencies (Details)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
claim
Dec. 31, 2019
USD ($)
claim
Dec. 31, 2018
USD ($)
claim
Dec. 31, 2017
USD ($)
claim
Loss Contingencies [Line Items]        
Asbestos-related adjustments $ 23 $ 0 $ 23 $ 0
Accrual for Environmental Loss Contingencies Disclosure [Abstract]        
Waste disposal sites with potential liability under the Comprehensive Environmental Response, Compensation and Liability Act   14 28  
Accrual for indicated environmental liabilities 9 $ 3 $ 9  
Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid   38 46  
Actuarial revaluation   0 23  
Indemnity and defense related costs   (37) (46)  
Derecognized liability   (768) 0  
Loss Contingency, Range of Possible Loss, Portion Not Accrued   100    
Cash and notes received from insurers 271   271  
Assets [Abstract]        
Non-current assets 303 0 303  
Deferred asbestos-related insurance asset 83 0 83  
Liabilities [Abstract]        
Total accrued liabilities $ 805 $ 0 $ 805 $ 828
Asbestos Issue [Member]        
Accrual for Environmental Loss Contingencies Disclosure [Abstract]        
Beginning claims January 1 | claim   8,598 9,225  
New claims received | claim   1,667 1,932  
Dismissed claims | claim   (967) (2,189)  
Settled claims | claim   (237) (370)  
Derecognized claims | claim   (9,061) 0  
Ending claims December 31 | claim 8,598 0 8,598 9,225
Assets [Abstract]        
Deferred asbestos-related insurance asset $ 83   $ 83  
Total insurance assets 386 $ 0 386  
Liabilities [Abstract]        
Total accrued liabilities 805 0 805  
Aggregate insurance coverage available 386   386  
Accounts Payable and Accrued Liabilities [Member] | Asbestos Issue [Member]        
Liabilities [Abstract]        
Total accrued liabilities 50 0 50  
Other non-current liabilities | Asbestos Issue [Member]        
Liabilities [Abstract]        
Total accrued liabilities $ 755 $ 0 $ 755