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DEBT - Credit Facility (Narrative) (Details)
 12 Months Ended
Jun. 04, 2015
USD ($)
quarter
Jun. 30, 2018
USD ($)
Line of Credit Facility [Line Items]    
Debt Instrument, Covenant Compliance, Number of Quarters | quarter 4  
Authorized share repurchase program   $ 200,000,000.0
Interest expense incurred   6,600,000
Cash paid for interest expense   $ 5,900,000
Revolving Credit Facility    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 750,000,000.0  
Additional borrowing capacity $ 250,000,000.0  
Commitment fee, as a percent   0.125%
Maximum leverage ratio 3.00  
Minimum interest coverage ratio 3.00  
Indebtedness or guarantee threshold $ 30,000,000.0  
Judgment default threshold $ 30,000,000.0  
Amount of credit facility utilized to fund acquisition   $ 30,000,000
Payments on S2S Global revolving line of credit   $ 150,000,000
Revolving Credit Facility | Base Rate Loans | Federal Funds Effective Swap Rate    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 0.50%  
Revolving Credit Facility | Base Rate Loans | LIBOR    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.00%  
Revolving Credit Facility | Base Rate Loans | Three-Month Eurodollar    
Line of Credit Facility [Line Items]    
Interest rate   5.125%
Revolving Credit Facility | Eurodollar Rate Loans | Three-Month Eurodollar    
Line of Credit Facility [Line Items]    
Interest rate   3.461%
Revolving Credit Facility | Minimum    
Line of Credit Facility [Line Items]    
Commitment fee on unused credit facility, as a percent 0.125%  
Revolving Credit Facility | Minimum | Base Rate Loans | Applicable Margin    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 0.125%  
Revolving Credit Facility | Minimum | Eurodollar Rate Loans | Applicable Margin    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.125%  
Revolving Credit Facility | Maximum    
Line of Credit Facility [Line Items]    
Commitment fee on unused credit facility, as a percent 0.25%  
Revolving Credit Facility | Maximum | Base Rate Loans | Applicable Margin    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 0.75%  
Revolving Credit Facility | Maximum | Eurodollar Rate Loans | Applicable Margin    
Line of Credit Facility [Line Items]    
Basis spread on variable rate 1.75%  
Letter of Credit    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 25,000,000.0  
Swing Line Loan    
Line of Credit Facility [Line Items]    
Maximum borrowing capacity $ 75,000,000.0