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Contingencies - Asbestos (Details)
 12 Months Ended
Dec. 31, 2019
USD ($)
lawsuit
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 1993
USD ($)
Contingencies        
Sale of goods containing asbestos from 1948 to 1958 $ 40,000,000      
Approximate number of claims disposed | lawsuit 401,200      
Average indemnity payment per claim $ 10,200      
Claims disposed | lawsuit 150      
Asbestos-related cash payments $ 151,000,000 $ 105,000,000 $ 110,000,000  
Cash payments per claim disposed including legal costs 129,000 86,000 83,000  
Asbestos-related liability, total amount accrued beginning in 1993 through current reporting period before insurance recoveries 5,000,000,000.0     $ 975,000,000
Accrual of asbestos related liability 486,000,000 602,000,000    
Asbestos related charges $ 35,000,000 $ 125,000,000 $ 0