Financial Instruments (Schedule of Fair Value Gain Loss Derivative Instrument) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Derivative [Line Items]
Document Period End Date	Jun. 30, 2017
Fair Value Hedging | Interest Rate Swaps
Derivative [Line Items]
Notional Amount	$ 1,813	$ 1,963
Fair Value Gain/(Loss)	(19)	34
Cash Flow Hedging | Interest Rate Swaps
Derivative [Line Items]
Notional Amount	0	300
Fair Value Gain/(Loss)	0	(10)
Cash Flow Hedging | Foreign Currency Contracts
Derivative [Line Items]
Notional Amount	720	675
Fair Value Gain/(Loss)	1	(2)
Cash Flow Hedging | Commodity Contracts
Derivative [Line Items]
Notional Amount	17	22
Fair Value Gain/(Loss)	$ (1)	$ (3)