Borrowings (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended					12 Months Ended				12 Months Ended			1 Months Ended	12 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended			12 Months Ended
	Jun. 30, 2012 BasisPoint	Jun. 30, 2011	May 31, 2007 Six Point One Two Five Percent Senior Notes [Member]	May 30, 2007 Six Point One Two Five Percent Senior Notes [Member]	Mar. 29, 2007 Senior Unsecured Credit Facility [Member]	Jun. 30, 2012 Five-Year Term Loan Facility [Member]	Jun. 30, 2011 Five-Year Term Loan Facility [Member] BasisPoint	Sep. 22, 2011 Five-Year Term Loan Facility [Member]	Mar. 29, 2007 Five-Year Term Loan Facility [Member]	Jun. 30, 2012 Five-Year Term Loan Facility [Member] Minimum [Member] BasisPoint	Jun. 30, 2012 Five-Year Term Loan Facility [Member] Maximum [Member] BasisPoint	Jun. 30, 2011 Five-Year Term Loan Facility [Member] Maximum [Member] BasisPoint	Sep. 22, 2011 Five-Year Revolving Credit Facility [Member]	Jun. 30, 2012 Five-Year Revolving Credit Facility [Member] BasisPoint	Jun. 30, 2011 Five-Year Revolving Credit Facility [Member]	Mar. 29, 2007 Five-Year Revolving Credit Facility [Member]	Jun. 30, 2011 Five-Year Revolving Credit Facility [Member] Minimum [Member] BasisPoint	Mar. 29, 2007 One-Year Revolving Credit Facility [Member]	Jun. 30, 2012 2011 Credit Facility [Member] BasisPoint	Sep. 22, 2011 2011 Credit Facility [Member]	Jun. 30, 2012 Previous Five-Year Term Loan Facility [Member]	Jun. 30, 2012 Previous Five-Year Revolving Credit Facility [Member]	Jun. 30, 2012 Two Thousand Twelve Term Loan [Member]	Jun. 30, 2012 Senior Notes [Member]	May 30, 2007 Senior Notes [Member]
Line of Credit Facility [Line Items]
Long-term debt, Total Capacity	$ 524.4	$ 124.3			$ 1,190.0				$ 440.0							$ 500.0		$ 250.0
Senior notes offered			250.0	250.0
Interest rate																								6.125%	6.125%
Interest at LIBOR plus basis points	250						40			40	90	75					27		125
Repayment of revolving credit facility	90.0						200.0								200.0
Credit facility maximum borrowing capacity	490.0							490.0					500.0							990.0
Loan in the duration of years						Five							Five
Annual facility fee (as basis points)														15
Debt issuance costs	2.9																		3.0					1.9
Debt issuance cost expensed																			0.1
Debt issuance cost capitalized																			2.9
Accumulated Amortization of debt issuance costs																			0.4
Repayment of short-term borrowings	400.0	40.0																			200.0	200.0
Weighted-average interest rate						65.00%	77.00%							51.00%	57.00%								1.54%
Minimum principal repayments on the loan						12.3
Total repayment before the balance of the loan becomes due in September 2016						171.5
First payment due on the loan						Mar. 31, 2013
Final payment due on the loan						June 30, 2016
Outstanding amount of line of credit	0	0																					400.0
Percentage of notes issued	99.10%
Effective yield to maturity	6.251%
Amortization related to the senior notes																								0.8
Senior Notes, fair value	$ 137.6