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Divestitures (Details)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
business
Jun. 30, 2019
business
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
business
$ / shares
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Pre-tax gains on disposal of businesses | $       $ 44 $ (2) $ 1
2019 Divestitures Plan | Disposal Group, Held-for-Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Divestiture of businesses, annual revenues (up to) | $     $ 1,000      
Number of businesses divested | business   6   3    
Operating revenue | $       $ 373 393 397
2019 Divestitures Plan | Disposal Group, Disposed of by Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of businesses divested | business 3     3    
Pre-tax gains on disposal of businesses | $       $ 44    
After-tax gains on disposal of businesses | $       $ 30    
After-tax gains on disposal of businesses, per diluted share (in dollars per share) | $ / shares       $ 0.09    
Operating revenue | $       $ 134 $ 194 $ 202
Test & Measurement and Electronics | 2019 Divestitures Plan | Disposal Group, Held-for-Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of businesses divested | business   2   1    
Test & Measurement and Electronics | 2019 Divestitures Plan | Disposal Group, Disposed of by Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of businesses divested | business 1          
Operating revenue | $       $ 58    
Automotive OEM | 2019 Divestitures Plan | Disposal Group, Held-for-Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of businesses divested | business   1   1    
Welding | 2019 Divestitures Plan | Disposal Group, Held-for-Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of businesses divested | business   1        
Welding | 2019 Divestitures Plan | Disposal Group, Disposed of by Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of businesses divested | business 1          
Operating revenue | $       $ 62    
Specialty Products | 2019 Divestitures Plan | Disposal Group, Held-for-Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of businesses divested | business   2   1    
Specialty Products | 2019 Divestitures Plan | Disposal Group, Disposed of by Sale            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of businesses divested | business 1          
Operating revenue | $       $ 14