v3.7.0.1
Reconciliation of Total Assets Measured at Fair Value on Recurring Basis to Balance Sheet Presentation (Detail) - USD ($)
$ in Millions
Jun. 30, 2017
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 $ 133,985 $ 119,019
Other 1 12
Recorded basis of investment components 139,004 123,671
Other Current and Long-term Assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Less derivative net assets classified as other current and long-term assets (202) (246)
Fair Value, Measurements, Recurring    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Cash 3,624 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 1,073 767
Other investments measured at fair value on a nonrecurring basis $ 523 $ 618