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Acquisitions and Divestitures - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2018
Mar. 31, 2020
Mar. 31, 2019
Jun. 30, 2019
Acquisitions And Discontinued Operations [Line Items]        
Purchase price, net of cash acquired $ 13 $ 61    
Cash paid for business acquisition   58 $ 13  
Goodwill, Acquired During Period   39    
Business divestitures, net of cash divested   0 6  
Power Solutions        
Acquisitions And Discontinued Operations [Line Items]        
Proceeds from Divestiture of Businesses       $ 13,200
Business Divestitures, Not Specific [Member]        
Acquisitions And Discontinued Operations [Line Items]        
Proceeds from Divestiture of Businesses     18  
Business divestitures, net of cash divested     6  
Global Products | Individually Immaterial Acquisitions        
Acquisitions And Discontinued Operations [Line Items]        
Goodwill, Acquired During Period $ 9 19    
Building Solutions EMEA/LA        
Acquisitions And Discontinued Operations [Line Items]        
Goodwill, Written off Related to Sale of Business Unit     $ 1  
Building Solutions EMEA/LA | Individually Immaterial Acquisitions        
Acquisitions And Discontinued Operations [Line Items]        
Goodwill, Acquired During Period   $ 20