Share-Based Compensation (Summary Of Information Related To Performance Share Units Under Plans Based On Target Award Amounts) (Details) (Performance Share Units [Member], USD $) In Millions, except Per Share data, unless otherwise specified	9 Months Ended
	Mar. 31, 2012
Schedule Of Activity Related To Performance Share Units [Line Items]
Share Units, Nonvested at June 30, 2011	0
Share Units, Granted	0.4
Share Units, Vested	0
Share Units, Canceled and forfeited	0
Share Units, Nonvested at March 31, 2012	0.4	[1]
Weighted Average Grant Date Fair Value Per Share, Nonvested at June 30, 2011	$ 0.00
Weighted Average Grant Date Fair Value Per Share, Granted	$ 42.65
Weighted Average Grant Date Fair Value Per Share, Vested	$ 0.00
Weighted Average Grant Date Fair Value Per Share, Canceled and forfeited	$ 0.00
Weighted Average Grant Date Fair Value Per Share, Nonvested at March 31, 2012	$ 42.65	[1]
Maximum Award Level [Member]
Schedule Of Activity Related To Performance Share Units [Line Items]
Share Units, Nonvested at March 31, 2012	0.8

[1] The outstanding nonvested performance share units as of March 31, 2012, at the maximum award level was 0.8 million.