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Maturities of Long-term Debt (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Jun. 30, 2019
Debt Disclosure [Abstract]    
Year Ending June 30, 2020 (excluding the six months ended December 31, 2019) $ 3,000  
Year Ending June 30, 2021 3,750  
Year Ending June 30, 2022 7,964  
Year Ending June 30, 2023 2,750  
Year Ending June 30, 2024 5,250  
Thereafter 47,482  
Total $ 70,196 $ 72,781