Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Oct. 25, 2011
Income Taxes [Abstract]
Effective income tax rate	36.40%	39.60%	37.80%	41.50%
Reserve for acquired uncertain tax position					$ 2.1