Borrowings (Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended								12 Months Ended				24 Months Ended		12 Months Ended
	Mar. 30, 2007	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 Maximum [Member] Five-Year Revolving Credit Facility [Member]	Jun. 30, 2011 Minimum [Member] Five-Year Revolving Credit Facility [Member]	Jun. 30, 2011 Senior Notes [Member]	Jun. 30, 2009 Senior Notes [Member]	May 31, 2007 Senior Notes [Member]	Mar. 29, 2007 Senior Unsecured Credit Facility [Member]	Jun. 30, 2011 Five-Year Term Loan Facility [Member]	Jun. 30, 2010 Five-Year Term Loan Facility [Member]	Jun. 30, 2008 Five-Year Term Loan Facility [Member]	Jun. 30, 2007 Five-Year Term Loan Facility [Member]	Jun. 30, 2008 Five-Year Term Loan Facility [Member]	Mar. 29, 2007 Five-Year Term Loan Facility [Member]	Jun. 30, 2011 Five-Year Revolving Credit Facility [Member]	Mar. 29, 2007 Five-Year Revolving Credit Facility [Member]	May 31, 2007 One-Year Revolving Credit Facility [Member]	Mar. 29, 2007 One-Year Revolving Credit Facility [Member]	May 31, 2007 Six Point One Two Five Percent Senior Notes [Member]	Jun. 30, 2011 Fixed-Rate Senior Notes [Member]
Long-term debt, Total Capacity		$ 124,300,000	$ 324,100,000			$ 124,300,000			$ 1,190,000,000						$ 440,000,000	$ 240,000,000	$ 500,000,000	$ 250,000,000	$ 250,000,000
Interest at LIBOR plus basis points		250
Interest at LIBOR plus basis points, minimum										40	40					27
Interest at LIBOR plus basis points, maximum										90						75
Weighted-average interest rate										0.77%	0.85%					0.57%
Actual annual facility fee basis points		8	8
Contractual annual facility fee basis points				20	8
Amount of annual facility fee		500,000,000
Debt issuance costs						1,900,000										1,500,000
Proceeds received due to borrowings transferred	690,000,000
Interest rate								6.125%
Repayment of revolving credit facility												170,000,000	70,000,000	240,000,000		40,000,000
Principal amount of senior notes redeemed							125,000,000
Consideration paid to extinguish senior notes						116,300,000
Percentage of notes issued		99.10%
Effective yield to maturity		6.251%
Unamortized bond discount							1,000,000
One-time non-cash gain from early extinguishment of senior note		8,400,000
Outstanding amount of line of credit		0	0							200,000,000
Fair value of the fixed-rate senior notes																					130,800,000
Senior notes offered																				$ 250,000,000