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Segment Information (Narrative) (Details)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Sep. 30, 2022
USD ($)
Mar. 31, 2022
USD ($)
Mar. 31, 2023
USD ($)
segment
Mar. 31, 2022
USD ($)
Segment Reporting Information [Line Items]            
Loss Related to Litigation Settlement $ (76)     $ 61 $ (256) $ 113
Project costs on investment and other spending 9     20 $ 20 38
Number of reportable segments | segment         2  
Number of operating segments | segment         2  
Goodwill impairment         $ 863  
Number of operating segments | segment         2  
Number of reportable segments | segment         2  
Project costs on investment and other spending $ 9     $ 20 $ 20 $ 38
Medical Unit            
Segment Reporting Information [Line Items]            
Goodwill impairment         863  
Medical            
Segment Reporting Information [Line Items]            
Goodwill impairment   $ 709 $ 154   $ 863