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Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Goodwill [Line Items]            
Goodwill $ 5,855     $ 5,855 $ 7,989 $ 8,357
Amortization of Intangible Assets       311 428 512
Estimated annual amortization of intangible assets - 2023 283     283    
Estimated annual amortization of intangible assets - 2024 260     260    
Estimated annual amortization of intangible assets - 2025 235     235    
Estimated annual amortization of intangible assets - 2026 208     208    
Estimated annual amortization of intangible assets - 2027 $ 175     175    
Goodwill, Impairment Loss       2,084 0 0
Medical Unit            
Goodwill [Line Items]            
Discount Rate, fair value inputs 10.00% 9.50% 9.00%      
Goodwill $ 1,900     1,900    
Goodwill, Impairment Loss $ 303 $ 474 $ 1,300 2,100    
Terminal Growth Rate, Fair Value Input 2.00% 2.00% 2.00%      
Medical            
Goodwill [Line Items]            
Goodwill $ 3,182     3,182 5,330 5,700
Accumulated goodwill impairment loss 3,500     3,500 1,400  
Goodwill, Impairment Loss       2,084    
Pharmaceutical            
Goodwill [Line Items]            
Goodwill 2,673     2,673 2,659 $ 2,657
Accumulated goodwill impairment loss $ 829     829 $ 829  
Goodwill, Impairment Loss       $ 0