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Financial Instruments (Schedule of Outstanding Instruments, Fair Value Hedges) (Details) - Fair Value Hedging - Interest Rate Swap - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Derivative [Line Items]    
Notional Amount $ 1,963 $ 1,613
Minimum    
Derivative [Line Items]    
Maturity Date Jun. 15, 2017 Jun. 15, 2017
Maximum    
Derivative [Line Items]    
Maturity Date Sep. 15, 2025 Jun. 15, 2022