v3.19.2
Debt - Additional Information (Detail) - USD ($)
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Debt Disclosure [Abstract]      
Commercial paper $ 0 $ 0  
Long-term debt 72,200,000,000 76,200,000,000  
Long-term debt fair value 78,900,000,000 77,500,000,000  
Cash paid for interest 2,400,000,000 2,400,000,000 $ 1,600,000,000
Debt issuance costs and unamortized discount $ 603,000,000 $ 658,000,000