Long-Term Debt (Term Loan And Revolver) (Narrative) (Details) (USD $) In Millions, unless otherwise specified	2 Months Ended		12 Months Ended			2 Months Ended	3 Months Ended	12 Months Ended		2 Months Ended
	Dec. 31, 2011	Nov. 09, 2011	Jun. 30, 2012 Old Term Loan [Member]	Jun. 30, 2011 Old Term Loan [Member]	Jun. 30, 2010 Old Term Loan [Member]	Dec. 31, 2011 Term Loan [Member]	Mar. 31, 2012 Term Loan [Member]	Jun. 30, 2012 Term Loan [Member]	Nov. 09, 2011 Term Loan [Member]	Dec. 31, 2011 Revolving Credit Facility [Member]	Nov. 09, 2011 Revolving Credit Facility [Member]	Nov. 09, 2011 LIBOR [Member] Term Loan [Member]
Debt Instrument [Line Items]
Credit agreement, maximum capacity		$ 700							$ 600		$ 100
Debt instrument, face amount									600
Term loan period, years						5 years
Term loan repayment as percentage of principal in year 1						1.25%
Term loan repayment as percentage of principal in year 2						1.25%
Term loan repayment as percentage of principal in year 3						1.88%
Term loan repayment as percentage of principal in year 4						1.88%
Term loan repayment as percentage of principal in year 5						2.50%
Quarterly scheduled principal payment							7.5
Interest addition to floating rate												2.50%
Interest expense			2.7	7.3	7.4			10.9
Revolver credit agreement term, years										5 years
Repayment of line of credit debt	$ 332.9