v3.2.0.727
Borrowings - Outstanding Borrowings (Detail) - USD ($)
12 Months Ended
Jun. 30, 2015
Aug. 14, 2014
Jun. 30, 2014
Line Of Credit Facility Covenant Compliance [Line Items]      
Revolving credit facility outstanding borrowings $ 0   $ 0
Total debt 689,400,000   524,100,000
Unused Available Capacity $ 585,000,000    
2007 Senior Notes [Member]      
Line Of Credit Facility Covenant Compliance [Line Items]      
Expiration Date Jun. 30, 2017    
Senior notes $ 124,800,000   124,600,000
2014 Senior Notes [Member]      
Line Of Credit Facility Covenant Compliance [Line Items]      
Expiration Date Sep. 30, 2020    
Senior notes $ 399,600,000   399,500,000
Revolving Credit Facility [Member] | Fiscal 2015 Revolving Credit Facility [Member]      
Line Of Credit Facility Covenant Compliance [Line Items]      
Expiration Date Aug. 30, 2019    
Credit facility maximum borrowing capacity   $ 750,000,000.0  
Revolving credit facility outstanding borrowings $ 165,000,000   $ 0
Unused Available Capacity $ 585,000,000