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Segment Information (Narrative) (Details)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Mar. 31, 2021
USD ($)
Mar. 31, 2022
USD ($)
segment
Mar. 31, 2021
USD ($)
Segment Reporting Information [Line Items]          
Loss Related to Litigation Settlement $ 61   $ 15 $ 113 $ 1,085
Project costs on investment and other spending 20   4 $ 38 15
Number of reportable segments | segment       2  
Number of operating segments | segment       2  
Goodwill, Impairment Loss       $ 1,781  
Number of operating segments | segment       2  
Number of reportable segments | segment       2  
Project costs on investment and other spending 20   $ 4 $ 38 15
Medical Unit          
Segment Reporting Information [Line Items]          
Goodwill, Impairment Loss $ 474 $ 1,300   1,800  
Medical          
Segment Reporting Information [Line Items]          
Goodwill, Impairment Loss       $ 1,781  
New York Opioid Stewardship Act [Member]          
Segment Reporting Information [Line Items]          
Estimated Liability for New York Opioid Stewardship Act         41
Total Opioid Litigation [Member]          
Segment Reporting Information [Line Items]          
Litigation Settlement, Expense         $ 1,020