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