Annual report pursuant to Section 13 and 15(d)

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

v3.3.1.900
FAIR VALUE OF FINANCIAL INSTRUMENTS (Carrying Value And Fair Value Of Financial Instruments Disclosure) (Details) - USD ($)
Dec. 31, 2015
Mar. 31, 2015
Dec. 31, 2014
Long-term debt:      
LONG-TERM DEBT $ 2,699,400,000   $ 2,826,500,000
Seven Hundred Million Four Point Eight Seven Five Two Thousand Twenty-one Senior Note [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt Instrument, Face Amount 700,000,000   700,000,000
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
Senior Notes - $400 Million [Member]      
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]      
Debt Instrument, Face Amount 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, Face Amount 500,000,000   500,000,000.0
Interest Rate Swap [Member]      
Long-term debt:      
Fair Value Adjustment to Interest Rate Hedge 2,300,000   2,800,000
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  
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
Fair Value, Inputs, Level 2 [Member]      
Long-term debt:      
Long-term Debt, Fair Value 898,200,000   1,614,200,000
Fair Value, Inputs, Level 2 [Member] | Seven Hundred Million Four Point Eight Seven Five Two Thousand Twenty-one Senior Note [Member]      
Long-term debt:      
Debt Instrument, Fair Value Disclosure 69,400,000   367,300,000
Fair Value, Inputs, Level 2 [Member] | Senior Notes - $1.3 Billion [Member]      
Long-term debt:      
Debt Instrument, Fair Value Disclosure 137,400,000   704,000,000
Fair Value, Inputs, Level 2 [Member] | Senior Notes - $400 Million [Member]      
Long-term debt:      
Debt Instrument, Fair Value Disclosure 52,800,000   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 87,100,000   312,000,000
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 2,300,000   2,800,000
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 134,700,000 $ 397,200,000 0
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 414,500,000   0
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]      
Long-term debt:      
LONG-TERM DEBT 2,699,400,000   2,826,500,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Seven Hundred Million Four Point Eight Seven Five Two Thousand Twenty-one Senior Note [Member]      
Long-term debt:      
Senior notes, carrying value 410,600,000   686,000,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Senior Notes - $1.3 Billion [Member]      
Long-term debt:      
Senior notes, carrying value 787,900,000   1,270,500,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Senior Notes - $400 Million [Member]      
Long-term debt:      
Senior notes, carrying value 288,900,000   391,900,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | $500 Million 3.95% 2018 Senior Notes [Member]      
Long-term debt:      
Senior notes, carrying value 309,100,000   475,300,000
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Revolving Credit 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 2,300,000   2,800,000
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]      
Long-term debt:      
Senior notes, carrying value 403,200,000   0
Reported Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Five hundred forty million Eight point two five Twenty twenty First Lien Notes [Member]      
Long-term debt:      
Senior notes, carrying value $ 497,400,000   $ 0