Annual report pursuant to Section 13 and 15(d)

LONG-TERM DEBT (4.875% Senior Notes) (Details)

v3.8.0.1
LONG-TERM DEBT (4.875% Senior Notes) (Details) - 4.875% Senior Notes Due 2024 [Member] - USD ($)
12 Months Ended
Dec. 31, 2017
Oct. 31, 2016
Debt Instrument [Line Items]    
Face amount $ 575,000,000 $ 575,000,000
Interest rate, stated percentage 4.875% 4.875%
Prior to November 1, 2019 [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 100.00%  
Redemption, Equity Offering [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 104.875%  
Percentage of notes which may be redeemed 35.00%  
After November 1, 2019 [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 103.656%  
Redemption, Defined Changes of Control [Member]    
Debt Instrument [Line Items]    
Redemption price, percentage 101.00%