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Segment Information (Assets by Reportable Segment) (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Jun. 30, 2020
Segment Reporting Information [Line Items]    
Total assets $ 43,874 $ 40,766
Total assets held for sale 1,092 0
Cordis Divestiture    
Segment Reporting Information [Line Items]    
Total assets held for sale 1,082  
Medical | Cordis Divestiture    
Segment Reporting Information [Line Items]    
Total assets held for sale 1,100  
Operating Segments | Pharmaceutical    
Segment Reporting Information [Line Items]    
Total assets 23,078 22,398
Operating Segments | Medical    
Segment Reporting Information [Line Items]    
Total assets 15,280 14,691
Corporate    
Segment Reporting Information [Line Items]    
Total assets $ 5,516 $ 3,677