Share-Based Compensation and Savings Plans (Schedule of all Transactions Related to Performance Share Units Under the Plans) (Details) - Performance Share Units - $ / shares shares in Millions	12 Months Ended
	Jun. 30, 2015		Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested at Beginning of Period	0.9		0.8
Granted	0.2		0.3
Vested	(0.2)	[1]	(0.2)	[2]
Canceled and forfeited	0.0		0.0
Nonvested at End of Period	0.9		0.9
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted-Average Grant Date Fair Value [Roll Forward]
Weighted-Average Grant Date Fair Value Per Share, Nonvested at Beginning of Period	$ 44.41		$ 41.37
Weighted-Average Grant Date Fair Value Per Share, Granted	71.63		51.49
Weighted-Average Grant Date Fair Value Per Share, Vested	41.59		41.60
Weighted-Average Grant Date Fair Value Per Share, Canceled and forfeited	0.00		0.00
Weighted-Average Grant Date Fair Value Per Share, Nonvested at End of Period	$ 50.31		$ 44.41

[1] Vested based on achievement of 120 percent of the target performance goal.

[2] Vested based on achievement of 143 percent of the target performance goal.