FAIR VALUE MEASUREMENTS (Carrying Value And Fair Value Of Financial Instruments Disclosure) (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Long-term debt:
Total long-term debt, carrying value	$ 2,499,100,000	$ 2,699,400,000
$700 Million 4.875% 2021 Senior Note [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Original Face Value	700,000,000	700,000,000
Senior Notes One Point Three Billion [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Original Face Value	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, Original Face Value	400,000,000	400,000,000
$500 Million 3.95% 2018 Senior Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Original Face Value	500,000,000.0	500,000,000.0
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, Original Face Value	540,000,000
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, Original Face Value	544,200,000.0
Interest Rate Swap [Member]
Long-term debt:
Fair Value Adjustment to Interest Rate Hedge	2,200,000	2,300,000
Fair Value, Inputs, Level 2 [Member]
Long-term debt:
Total long-term debt, fair value	1,176,400,000	898,200,000
Fair Value, Inputs, Level 2 [Member] | $700 Million 4.875% 2021 Senior Note [Member]
Long-term debt:
Debt Instrument, Fair Value Disclosure	98,000,000	69,400,000
Fair Value, Inputs, Level 2 [Member] | Senior Notes One Point Three Billion [Member]
Long-term debt:
Debt Instrument, Fair Value Disclosure	165,200,000	137,400,000
Fair Value, Inputs, Level 2 [Member] | $400 Million 5.90% 2020 Senior Notes [Member]
Long-term debt:
Debt Instrument, Fair Value Disclosure	70,200,000	52,800,000
Fair Value, Inputs, Level 2 [Member] | $500 Million 3.95% 2018 Senior Notes [Member]
Long-term debt:
Debt Instrument, Fair Value Disclosure	138,000,000	87,100,000
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	466,900,000	414,500,000
Fair Value, Inputs, Level 2 [Member] | Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member]
Long-term debt:
Debt Instrument, Fair Value Disclosure	94,000,000	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	141,900,000	134,700,000
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	2,200,000	2,300,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Long-term debt:
Total long-term debt, carrying value	2,516,600,000	2,699,400,000
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	334,700,000	410,600,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Senior Notes One Point Three Billion [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes, Noncurrent	553,000,000	787,900,000
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	224,300,000	288,900,000
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	281,900,000	309,100,000
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	499,700,000	497,400,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Two hundred Eighteen Point Five Million Eight Point Zero Twenty Twenty One Point Five Lien Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior Notes, Noncurrent	297,300,000	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	323,500,000	403,200,000
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	$ 2,200,000	$ 2,300,000