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FINANCING ARRANGEMENTS - LONG-TERM BORROWINGS (Details)
Jun. 30, 2017
USD ($)
Debt Instrument [Line Items]  
Remaining borrowing capacity $ 545,000,000
Commercial Paper  
Debt Instrument [Line Items]  
Facility term loan outstanding 0
Revolving Credit Agreement  
Debt Instrument [Line Items]  
Line of credit, maximum borrowing capacity $ 500,000,000