Share-Based Compensation and Savings Plans (Schedule of Additional Data Related to Stock Option Activity) (Details) (Stock Options, USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Stock Options
Aggregate intrinsic value of outstanding options at period end, Stock Options	$ 156	$ 137	$ 217
Aggregate intrinsic value of exercisable options at period end, Stock Options	113	84	94
Aggregate intrinsic value of exercised options	64	27	26
Cash received upon exercise	121	42	63
Cash tax disbursements realized related to exercise, Stock Options	(19)	(4)	(14)
Total compensation cost, net of estimated forfeitures, related to Award Type not yet recognized, pre-tax	22	25	29
Total fair value of shares vested during the year	$ 28	$ 26	$ 24
Weighted-average grant date fair value per stock option	$ 8.15	$ 9.26	$ 6.40