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FAIR VALUE MEASUREMENTS (Carrying Value And Fair Value Of Financial Instruments Disclosure) (Details) - USD ($) $ in Millions | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Interest Rate Swap [Member] |  |
Long-term debt: |  |
Fair Value Adjustment to Interest Rate Hedge | $ 1.6 | $ 1.9
Carrying Value [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 1,611.8 | 2,192.6
Carrying Value [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] |  |
Long-term debt: |  |
Fair Value Adjustment to Interest Rate Hedge | 1.6 | 1.9
Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 1,582.7 | 2,224.6
Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] | Interest Rate Swap [Member] |  |
Long-term debt: |  |
Fair Value Adjustment to Interest Rate Hedge | 1.6 | 1.9
Senior Notes [Member] | $540 Million 8.25% 2020 Lien Notes [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Instrument, Original Face Value | 540.0 | 540.0
Senior Notes [Member] | $218.5 Million 8.00% 2020 Lien Notes [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Instrument, Original Face Value | 0.0 | 218.5
Senior Notes [Member] | $544 Million 7.75% 2020 Lien Notes[Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Instrument, Original Face Value | 0.0 | 544.2
Senior Notes [Member] | $500 Million 5.75% 2025 Senior Notes [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Instrument, Original Face Value | 500.0 | 0.0
Senior Notes [Member] | $400 Million 5.90% 2020 Senior Notes [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Instrument, Original Face Value | 400.0 | 400.0
Senior Notes [Member] | Senior Notes One Point Three Billion [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Instrument, Original Face Value | 1,300.0 | 1,300.0
Senior Notes [Member] | $700 Million 4.875% 2021 Senior Note [Member] |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt Instrument, Original Face Value | 700.0 | 700.0
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | $540 Million 8.25% 2020 Lien Notes [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 477.4 | 506.3
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | $544 Million 7.75% 2020 Lien Notes[Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 0.0 | 339.1
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | $500 Million 5.75% 2025 Senior Notes [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 491.9 | 0.0
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | $400 Million 5.90% 2020 Senior Notes [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 88.5 | 224.5
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes One Point Three Billion [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 414.5 | 528.4
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 1 [Member] | $700 Million 4.875% 2021 Senior Note [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 137.9 | 308.2
Senior Notes [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 2 [Member] | $218.5 Million 8.00% 2020 Lien Notes [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 0.0 | 284.2
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | $540 Million 8.25% 2020 Lien Notes [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 550.0 | 595.0
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | $544 Million 7.75% 2020 Lien Notes[Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 0.0 | 439.7
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | $500 Million 5.75% 2025 Senior Notes [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 473.8 | 0.0
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | $400 Million 5.90% 2020 Senior Notes [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 86.0 | 219.6
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | Senior Notes One Point Three Billion [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 339.7 | 455.8
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 1 [Member] | $700 Million 4.875% 2021 Senior Note [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 131.6 | 283.1
Senior Notes [Member] | Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] | $218.5 Million 8.00% 2020 Lien Notes [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 0.0 | 229.5
Line of Credit [Member] | Carrying Value [Member] | Fair Value, Inputs, Level 2 [Member] | Revolving Credit Facility [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | 0.0 | 0.0
Line of Credit [Member] | Fair Value [Member] | Fair Value, Inputs, Level 2 [Member] | Revolving Credit Facility [Member] |  |
Long-term debt: |  |
Total long-term debt, fair value | $ 0.0 | $ 0.0

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- Definition Face (par) amount of debt instrument at time of issuance. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 + Details
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