Annual report pursuant to Section 13 and 15(d)

FAIR VALUE OF FINANCIAL INSTRUMENTS (Carrying Value And Fair Value Of Financial Instruments Disclosure) (Details)

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FAIR VALUE OF FINANCIAL INSTRUMENTS (Carrying Value And Fair Value Of Financial Instruments Disclosure) (Details) - USD ($)
Dec. 31, 2016
Dec. 31, 2015
Long-term debt:    
LONG-TERM DEBT $ 2,175,100,000 $ 2,699,400,000
Long-term Debt, Fair Value 2,224,600,000 898,200,000
$540 Million 8.25% 2020 First Lien Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Instrument, Face Amount 540,000,000 540,000,000
$218.5 Million 8.00% 2020 1.5 Lien Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Instrument, Face Amount 218,500,000.0 218,500,000.0
$544.2 Million 7.75% 2020 Second Lien Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Instrument, Face Amount 544,200,000 544,200,000.0
$400 Million 5.90% 2020 Senior Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Instrument, Face Amount 400,000,000 400,000,000
Senior Notes - $1.3 Billion [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Instrument, Face Amount 1,300,000,000.0 1,300,000,000.0
$700 Million 4.875% 2021 Senior Notes[Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Instrument, Face Amount 700,000,000 700,000,000
$500 Million 3.95% 2018 Senior Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt Instrument, Face Amount 500,000,000 500,000,000.0
Interest Rate Swap [Member]    
Long-term debt:    
Fair Value Adjustment to Interest Rate Hedge 1,900,000 2,300,000
Fair Value, Inputs, Level 2 [Member] | ABL Facility [Member]    
Long-term debt:    
Revolving loan, fair value 0 0
Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]    
Long-term debt:    
Fair Value Adjustment to Interest Rate Hedge 1,900,000 2,300,000
Fair Value, Inputs, Level 1 [Member] | $540 Million 8.25% 2020 First Lien Notes [Member]    
Long-term debt:    
Debt Instrument, Fair Value Disclosure 595,000,000 414,500,000
Fair Value, Inputs, Level 1 [Member] | $544.2 Million 7.75% 2020 Second Lien Notes [Member]    
Long-term debt:    
Debt Instrument, Fair Value Disclosure 439,700,000 134,700,000
Fair Value, Inputs, Level 1 [Member] | $400 Million 5.90% 2020 Senior Notes [Member]    
Long-term debt:    
Debt Instrument, Fair Value Disclosure 219,600,000 52,800,000
Fair Value, Inputs, Level 1 [Member] | Senior Notes - $1.3 Billion [Member]    
Long-term debt:    
Debt Instrument, Fair Value Disclosure 455,800,000 137,400,000
Fair Value, Inputs, Level 1 [Member] | $700 Million 4.875% 2021 Senior Notes[Member]    
Long-term debt:    
Debt Instrument, Fair Value Disclosure 283,100,000 69,400,000
Fair Value, Inputs, Level 1 [Member] | $500 Million 3.95% 2018 Senior Notes [Member]    
Long-term debt:    
Debt Instrument, Fair Value Disclosure 0 87,100,000
Reported Value Measurement [Member]    
Long-term debt:    
LONG-TERM DEBT 2,192,600,000 2,699,400,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | ABL Facility [Member]    
Long-term debt:    
Senior notes, carrying value 0 0
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member]    
Long-term debt:    
Fair Value Adjustment to Interest Rate Hedge 1,900,000 2,300,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | $540 Million 8.25% 2020 First Lien Notes [Member]    
Long-term debt:    
Senior notes, carrying value 506,300,000 497,400,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | $544.2 Million 7.75% 2020 Second Lien Notes [Member]    
Long-term debt:    
Senior notes, carrying value 339,100,000 403,200,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | $400 Million 5.90% 2020 Senior Notes [Member]    
Long-term debt:    
Senior notes, carrying value 224,500,000 288,900,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes - $1.3 Billion [Member]    
Long-term debt:    
Senior notes, carrying value 528,400,000 787,900,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | $700 Million 4.875% 2021 Senior Notes[Member]    
Long-term debt:    
Senior notes, carrying value 308,200,000 410,600,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | $500 Million 3.95% 2018 Senior Notes [Member]    
Long-term debt:    
Senior notes, carrying value   $ 309,100,000
Senior Notes [Member] | Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | $218.5 Million 8.00% 2020 1.5 Lien Notes [Member]    
Long-term debt:    
Long-term Debt, Fair Value 284,200,000  
Senior Notes [Member] | Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | $218.5 Million 8.00% 2020 1.5 Lien Notes [Member]    
Long-term debt:    
Long-term Debt, Fair Value $ 229,500,000