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]
$ in Millions
3 Months Ended
Mar. 31, 2018
USD ($)
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%