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Restructuring Programs (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Restructuring Cost And Reserve [Line Items]      
Impairment and restructuring charges, net of termination payments $ 35 $ 133 $ 26
Payment for contract termination 65 423 23
Restructuring reserve, current 20 40  
Contract Termination Costs      
Restructuring Cost And Reserve [Line Items]      
Payment for contract termination 4 397 [1] $ 0
Cable Network Programming Segment      
Restructuring Cost And Reserve [Line Items]      
Impairment and restructuring charges, net of termination payments $ 35    
Cable Network Programming And Television Segments | USGA Programming Rights | Contract Termination Costs      
Restructuring Cost And Reserve [Line Items]      
Restructuring charges   425  
Write-off of programming rights advances   75  
Payment for contract termination   $ 320  
[1] Includes the write-off of approximately $75 million of programming rights advances.