Annual report pursuant to Section 13 and 15(d)

DEBT AND CREDIT FACILITIES (Schedule Of Long-Term Debt) (Details)

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DEBT AND CREDIT FACILITIES (Schedule Of Long-Term Debt) (Details)
 3 Months Ended 12 Months Ended
Sep. 30, 2016
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Feb. 28, 2018
USD ($)
Jan. 01, 2018
USD ($)
Dec. 31, 2016
USD ($)
Mar. 30, 2015
USD ($)
Debt Instrument [Line Items]              
Debt redemption premiums paid $ 17,400,000 $ 7,100,000 $ 110,000,000        
Long-term Debt     2,304,200,000        
LONG-TERM DEBT   2,092,900,000 $ 2,304,200,000   $ 2,304,200,000    
$400 Million 4.875% 2024 Senior Notes [Member]              
Debt Instrument [Line Items]              
Face amount   $ 400,000,000          
Debt Instrument, Interest Rate, Stated Percentage   4.875%          
Imputed interest rate   5.00% 5.00%        
Debt Instrument, Par Value   $ 400,000,000 $ 400,000,000        
Unamortized Debt Issuance Expense   (5,700,000) (7,100,000)        
Debt Instrument, Unamortized Discount   (2,200,000) (2,600,000)        
Long-term Debt   392,100,000 $ 390,300,000        
$218.5 Million 8.00% 2020 1.5 Lien Notes              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage     8.00%     8.00%  
Debt Instrument, Par Value           $ 218,500,000  
$500 Million 3.95% 2018 Senior Notes [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage           3.95%  
$400 Million 5.90% 2020 Senior Notes              
Debt Instrument [Line Items]              
Face amount   $ 400,000,000          
Debt Instrument, Interest Rate, Stated Percentage   5.90% 5.90%        
Imputed interest rate     5.98%        
Debt Instrument, Par Value     $ 88,900,000        
Unamortized Debt Issuance Expense     (200,000)        
Debt Instrument, Unamortized Discount     (100,000)        
Long-term Debt     $ 88,600,000        
$500 Million 4.80% 2020 Senior Notes              
Debt Instrument [Line Items]              
Face amount   $ 500,000,000          
Debt Instrument, Interest Rate, Stated Percentage   4.80% 4.80%     4.80%  
Imputed interest rate     4.83%        
Debt Instrument, Par Value     $ 122,400,000        
Unamortized Debt Issuance Expense     (300,000)        
Debt Instrument, Unamortized Discount     (100,000)        
Long-term Debt     $ 122,000,000        
$700 Million 4.875% 2021 Senior Notes              
Debt Instrument [Line Items]              
Face amount   $ 700,000,000          
Debt Instrument, Interest Rate, Stated Percentage   4.875% 4.875%     4.875%  
Imputed interest rate   4.89% 4.89%        
Debt Instrument, Par Value   $ 124,000,000 $ 138,400,000        
Unamortized Debt Issuance Expense   (200,000) (300,000)        
Debt Instrument, Unamortized Discount   0 (100,000)        
Long-term Debt   123,800,000 $ 138,000,000        
$316 Million 1.5% 2025 Senior Notes [Domain]              
Debt Instrument [Line Items]              
Face amount   $ 316,250,000.00          
Debt Instrument, Interest Rate, Stated Percentage   1.50%          
Imputed interest rate   6.26% 6.26%        
Debt Instrument, Par Value   $ 316,300,000 $ 316,300,000        
Unamortized Debt Issuance Expense   (5,500,000) (6,600,000)        
Debt Instrument, Unamortized Discount   (75,600,000) (85,600,000)        
Long-term Debt   $ 235,200,000 $ 224,100,000        
Note Redemption Price, Percent of Principal Amount to be Redeemed   100.00%          
$1.075 Billion 5.75% 2025 Senior Notes [Member]              
Debt Instrument [Line Items]              
Face amount   $ 1,075,000,000          
Debt Instrument, Interest Rate, Stated Percentage   5.75%          
Imputed interest rate   6.01% 6.01%        
Debt Instrument, Par Value   $ 1,073,300,000          
Unamortized Debt Issuance Expense   (9,900,000) $ (11,300,000)        
Debt Instrument, Unamortized Discount   (14,600,000) (16,500,000)        
Long-term Debt   $ 1,048,800,000 $ 1,047,200,000        
Note Redemption Price, Percent of Principal Amount to be Redeemed   100.00%          
Redemption Price of 35 percent or less of Outstanding   1.0575          
$800 Million 6.25% 2040 Senior Notes [Member]              
Debt Instrument [Line Items]              
Face amount   $ 800,000,000          
Imputed interest rate   6.34% 6.34%        
Debt Instrument, Par Value   $ 298,400,000 $ 298,400,000        
Unamortized Debt Issuance Expense   (2,300,000) (2,400,000)        
Debt Instrument, Unamortized Discount   (3,300,000) (3,400,000)        
Long-term Debt   292,800,000 292,600,000        
ABL Facility [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Par Value       $ 450,000,000     $ 550,000,000
Credit facility, amount outstanding   0 0        
Interest Rate Swap [Member]              
Debt Instrument [Line Items]              
Fair Value Adjustment to Interest Rate Hedge   $ 200,000 $ 1,400,000