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Long-Term Debt and Redeemable Preferred Stock - Components of Long-Term Debt and Redeemable Preferred Stock (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified		6 Months Ended		6 Months Ended
	Dec. 31, 2010 2010 Term Loan Facility Due 2015 [Member]	Jun. 30, 2011 2011 Term Loan Facility Due 2017 [Member]	Sep. 30, 2012 2011 Term Loan Facility Due 2017 [Member]	Jun. 30, 2011 2011 Revolving Credit Facility Due 2016 [Member]	Sep. 30, 2012 2011 Revolving Credit Facility Due 2016 [Member]	Apr. 30, 2012 Senior Subordinated Term Loan Due 2014 [Member]	Dec. 31, 2011 Senior Subordinated Term Loan Due 2014 [Member]	Apr. 30, 2012 Amended And Restated Senior Subordinated Term Loan Due 2014 [Member]
Debt Instrument And Redeemable Preferred Stock [Line Items]
Aggregate principal amount outstanding	$ 794.0	$ 800.0	$ 790.0				$ 107.0
Debt instrument, maturity term (years)		6 years 6 months		5 years
Maximum borrowings available under credit facility				$ 140.0	$ 140.0
Fixed Rate of Non-Contributed Loan						12.00%
Floating rate								7.00%
LIBOR floor								1.50%
Interest Rate of Non-Contributed Loan								8.50%
Reduction in interest rate of Non-Contributed Loan								3.50%

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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