Quarterly report pursuant to Section 13 or 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 ($)
Sep. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt Instrument, Face Amount $ 3,448,200,000   $ 3,980,000,000
Long-term debt:      
Long-term Debt 2,721,600,000   2,843,300,000
Total long-term debt, carrying value 2,721,600,000   2,843,300,000
$700 Million 4.875% 2021 Senior Note [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt Instrument, Face Amount 700,000,000   700,000,000
Long-term debt:      
Long-term Debt [1] 412,300,000   689,500,000
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
$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
Long-term debt:      
Long-term Debt [2] 289,900,000   393,700,000
$500 Million 3.95% 2018 Senior Notes [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt Instrument, Face Amount 500,000,000.0   500,000,000
Long-term debt:      
Long-term Debt [3] 309,900,000   477,400,000
Five hundred forty million Eight point two five Twenty twenty First Lien Notes [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt Instrument, Face Amount 540,000,000   0
Long-term debt:      
Long-term Debt 506,400,000    
Five hundred Forty-four Million Seven Point Seven Five Twenty Twenty Second Lien Notes [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt Instrument, Face Amount 544,200,000   0
Long-term debt:      
Debt Instrument, Fair Value Disclosure   $ 397,200,000  
Long-term Debt 407,400,000    
Revolving Credit Facility [Member]      
Long-term debt:      
Revolving loan, carrying value 0 [4]   0 [5]
Interest Rate Swap [Member]      
Long-term debt:      
Fair Value Adjustment to Interest Rate Hedge 2,400,000   2,800,000
Fair Value, Inputs, Level 2 [Member]      
Long-term debt:      
Total long-term debt, fair value 1,318,000,000   1,614,200,000
Fair Value, Inputs, Level 2 [Member] | $700 Million 4.875% 2021 Senior Note [Member]      
Long-term debt:      
Debt Instrument, Fair Value Disclosure 115,400,000   367,300,000
Fair Value, Inputs, Level 2 [Member] | Senior Notes - $1.3 Billion [Member]      
Long-term debt:      
Debt Instrument, Fair Value Disclosure 242,400,000   704,000,000
Fair Value, Inputs, Level 2 [Member] | $400 Million 5.90% 2020 Senior Notes [Member]      
Long-term debt:      
Debt Instrument, Fair Value Disclosure 99,600,000   228,100,000
Fair Value, Inputs, Level 2 [Member] | $500 Million 3.95% 2018 Senior Notes [Member]      
Long-term debt:      
Debt Instrument, Fair Value Disclosure 162,600,000   312,000,000
Fair Value, Inputs, Level 2 [Member] | Five hundred forty million Eight point two five Twenty twenty First Lien Notes [Member]      
Long-term debt:      
Debt Instrument, Fair Value Disclosure 477,900,000   0
Fair Value, Inputs, Level 2 [Member] | Five hundred Forty-four Million Seven Point Seven Five Twenty Twenty Second Lien Notes [Member]      
Long-term debt:      
Debt Instrument, Fair Value Disclosure 217,700,000 $ 397,200,000 0
Fair Value, Inputs, Level 2 [Member] | Revolving Credit 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 2,400,000   2,800,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]      
Long-term debt:      
Total long-term debt, carrying value 2,721,600,000   2,843,300,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | $700 Million 4.875% 2021 Senior Note [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes, Noncurrent 412,300,000   689,500,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Senior Notes - $1.3 Billion [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes, Noncurrent 793,300,000   1,279,900,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | $400 Million 5.90% 2020 Senior Notes [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes, Noncurrent 289,900,000   393,700,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | $500 Million 3.95% 2018 Senior Notes [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes, Noncurrent 309,900,000   477,400,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Five hundred forty million Eight point two five Twenty twenty First Lien Notes [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes, Noncurrent 506,400,000   0
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Five hundred Forty-four Million Seven Point Seven Five Twenty Twenty Second Lien Notes [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes, Noncurrent 407,400,000   0
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Revolving Credit Facility [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Senior Notes, Noncurrent 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 $ 2,400,000   $ 2,800,000
[1] During the third quarter of 2015, we purchased $10.7 million of outstanding 4.875 percent senior notes that were trading at 50.0 percent of par which resulted in a gain on extinguishment of $5.3 million. In addition, during the first quarter of 2015, we purchased $58.3 million of outstanding 4.875 percent senior notes that were trading at 52.0 percent of par, which resulted in a gain on extinguishment of $20.0 million. Also during the first quarter, on March 27, 2015, we exchanged as part of a tender offer $208.5 million of the 4.875 percent senior notes for $170.3 million of the 7.75 percent second lien notes at a discount of $46.0 million based on an imputed interest rate of 15.55 percent, resulting in a gain on extinguishment of $83.1 million, net of amounts expensed for unamortized original issue discount and deferred origination fees. As of September 30, 2015, the $700.0 million 4.875 percent senior notes were recorded at a par value of $412.5 million less unamortized discounts of $0.2 million, based on an imputed interest rate of 4.89 percent. As of December 31, 2014, the $700.0 million 4.875 percent senior notes were recorded at a par value of $690.0 million less unamortized discounts of $0.5 million based on an imputed interest rate of 4.88 percent.
[2] During the third quarter of 2015, we purchased $36.0 million of outstanding 5.90 percent senior notes that were trading at 50.0 percent of par, which resulted in a gain on extinguishment of $18.0 million. In addition, during the first quarter of 2015, we purchased $1.3 million of outstanding 5.90 percent senior notes that were trading at 58.0 percent of par, which resulted in a gain on extinguishment of $0.3 million. Also during the first quarter, on March 27, 2015, we exchanged as part of a tender offer $67.0 million of the 5.90 percent senior notes for $57.5 million of the 7.75 percent second lien notes at a discount of $15.5 million based on an imputed interest rate of 15.55 percent, resulting in a gain on extinguishment of $24.5 million, net of amounts expensed for unamortized original issue discount and deferred origination fees. As of September 30, 2015, the $400.0 million 5.90 percent senior notes were recorded at a par value of $290.8 million less unamortized discounts of $0.9 million, based on an imputed interest rate of 5.98 percent. As of December 31, 2014, the $400.0 million 5.90 percent senior notes were recorded at a par value of $395.0 million less unamortized discounts of $1.3 million based on an imputed interest rate of 5.98 percent.
[3] During the third quarter, on August 28, 2015, we purchased for cash as part of a tender offer, $124.8 million of the 3.95 percent senior notes for $68.6 million, resulting in a gain on extinguishment of $54.9 million, net of amounts expensed for reacquisition costs, unamortized original issue discount and deferred origination fees. In addition, during the first quarter of 2015, we purchased $44.0 million of outstanding 3.95 percent senior notes that were trading at 77.5 percent of par, which resulted in a gain on the extinguishment of debt of $7.1 million.As of September 30, 2015, the $500.0 million 3.95 percent senior notes were recorded at a par value of $311.2 million less unamortized discounts of $1.3 million, based on an imputed interest rate of 6.36 percent. As of December 31, 2014, the $500.0 million 3.95 percent senior notes were recorded at a par value of $480.0 million less unamortized discounts of $2.6 million based on an imputed interest rate of 5.17 percent.
[4] As of September 30, 2015, no loans were drawn under the ABL Facility and we had total availability of $442.9 million as a result of borrowing base limitations. As of September 30, 2015, the principal amount of letter of credit obligations totaled $187.3 million, thereby further reducing available borrowing capacity on our ABL Facility to $255.6 million.
[5] As of December 31, 2014, we had no revolving loans drawn under the revolving credit agreement which had $1.125 billion availability. As of December 31, 2014, the principal amount of letter of credit obligations totaled $149.5 million, thereby reducing available borrowing capacity on the revolving credit agreement to $975.5 million.