v3.5.0.2
Reconciliation of Total Assets Measured at Fair Value on Recurring Basis to Balance Sheet Presentation (Detail) - USD ($)
$ in Millions
Sep. 30, 2016
Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Net fair value of assets measured at fair value on a recurring basis $ 142,921 $ 119,019
Other assets 2 12
Recorded basis of investment components 147,392 123,646
Other Current Assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Less derivative net assets classified as other current assets (393) (246)
Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash 3,473 3,501
Fair Value, Measurements, Nonrecurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Common and preferred stock measured at fair value on a nonrecurring basis 802 767
Other investments measured at fair value on a nonrecurring basis $ 587 $ 593