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INCOME TAXES (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Contingency [Line Items] |  |  |  |
Unrecognized Tax Benefits | $ 156.2 | $ 72.6 | $ 71.8 | $ 53.5
Undistributed Earnings of Foreign Subsidiaries | 0.0 |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, State and Local | 3,900.0 | 1,900.0 |  |
Deferred Tax Assets, Operating Loss Carryforwards, Foreign | 11,100.0 | 4,500.0 |  |
Deferred Tax Assets, Tax Credit Carryforwards, Foreign | 5.8 |  |  |
Deferred Tax Assets, Tax Credit Carryforwards, Alternative Minimum Tax | 218.7 | $ 219.1 |  |
Valuation Allowance, Deferred Tax Asset, Change in Amount | $ 2,200.0 |  |  |
Document Fiscal Year Focus | 2015 |  |  |
Effective Income Tax Rate, Continuing Operations | 35.00% | 35.00% | 35.00% |
Current Fiscal Year End Date | --12-31 |  |  |
Reversal of Valuation Allowance on MRRT credits [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Valuation Allowance, Deferred Tax Asset, Change in Amount | $ 111.5 |  |  |
Deferred Tax Asset, Canadian Deferred Tax Asset that will not be realized [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Valuation Allowance, Deferred Tax Asset, Change in Amount | 2,200.0 |  |  |
Deferred Tax Asset, Domestic Deferred Tax Asset that will not be realized [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Valuation Allowance, Deferred Tax Asset, Change in Amount | 165.8 |  |  |
Other Noncurrent Assets [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Unrecognized Tax Benefits | 134.7 | $ 49.4 |  |
Other Liabilities [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Unrecognized Tax Benefits | 21.5 | 23.2 |  |
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued | 2.1 | $ 1.6 |  |
Deferred Tax Asset, Alternative Minimum Tax Credit Not Utilized [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Foreign | $ 1,600.0 |  |  |

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