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Estimated Future Amortization Expense Related to Intangible Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2020
Jun. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]    
Year Ending June 30, 2021 (excluding the six months ended December 31, 2020) $ 763  
Year Ending June 30, 2022 1,459  
Year Ending June 30, 2023 1,267  
Year Ending June 30, 2024 905  
Year Ending June 30, 2025 490  
Thereafter 1,671  
Net Carrying Amount $ 6,555 $ 7,038