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Segment Information (Narrative) (Details)
$ in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2020
USD ($)
segment
Dec. 31, 2019
USD ($)
Segment Reporting Information [Line Items]        
Gain (Loss) Related to Litigation Settlement $ 32 $ 21 $ 1,070 $ 5,694
Project costs on investment and other spending 6 17 $ 11 20
Number of reportable segments | segment     2  
Number of operating segments | segment     2  
Number of operating segments | segment     2  
Number of reportable segments | segment     2  
Project costs on investment and other spending $ 6 $ 17 $ 11 20
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]        
Gain (Loss) Related to Litigation Settlement     $ 1,020 5,630
Sterile Surgical Gown Recall [Member]        
Segment Reporting Information [Line Items]        
Inventory Recall Expense       $ 96