Share-Based Compensation and Savings Plans (Schedule of Additional Data Related to Stock Option Activity) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Cash received upon exercise	$ 72	$ 227	$ 121
Cash tax proceeds/(disbursements) realized related to exercise	52	39	(19)
Stock Options
Aggregate intrinsic value of outstanding options at period end	281	282	156
Aggregate intrinsic value of exercisable options at period end	193	185	113
Aggregate intrinsic value of exercised options	132	155	64
Cash received upon exercise	72	227	121
Cash tax proceeds/(disbursements) realized related to exercise	52	39	(19)
Total compensation cost, net of estimated forfeitures, related to unvested stock options not yet recognized, pre-tax	23	24	22
Total fair value of shares vested during the year	$ 20	$ 20	$ 28
Weighted-average grant date fair value per stock option	$ 15.80	$ 10.32	$ 8.15