Quarterly report pursuant to Section 13 or 15(d)

LONG-TERM DEBT (5.625% Senior Notes Due 2026) (Details)

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LONG-TERM DEBT (5.625% Senior Notes Due 2026) (Details) - 5.625% Senior Notes Due 2026 [Member] - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2018
Mar. 31, 2018
Debt Instrument [Line Items]    
Face Amount   $ 300
Interest rate, stated percentage   5.625%
Prior to March 15, 2021 [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 100.00%  
Redemption, Equity Offering [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 105.625%  
Percentage of notes which may be redeemed 35.00%  
After March 15, 2021 [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 104.219%  
Redemption, Defined Changes of Control [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 101.00%