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Estimated Future Amortization Expense Related to Intangible Assets (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Jun. 30, 2015
Finite-Lived Intangible Assets [Line Items]    
Year Ending June 30,2016 (excluding the six months ended December 31, 2015) $ 487  
Year Ending June 30, 2017 832  
Year Ending June 30, 2018 727  
Year Ending June 30, 2019 583  
Year Ending June 30, 2020 519  
Thereafter 1,471  
Net Carrying Amount $ 4,619 $ 4,835