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RECENT ACCOUNTING PRONOUNCEMENTS Adoption of ASU 2016-13: Opening Balance Sheet Cumulative Effect Adjustments (Details) - USD ($) $ in Millions | Jan. 01, 2020 | Dec. 31, 2019
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Receivable [Domain] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Balance as of December 31, 2019 - Prior to Adoption of ASU 2016-13 |  | $ 578.4
Balance as of January 1, 2020 - Subsequent to Adoption of ASU 2016-13 | $ 576.8 |
Receivable [Domain] | Accounting Standards Update 2016-13 [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 1.6 |
Other Current Assets [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Balance as of December 31, 2019 - Prior to Adoption of ASU 2016-13 |  | 153.4
Balance as of January 1, 2020 - Subsequent to Adoption of ASU 2016-13 | 153.3 |
Other Current Assets [Member] | Accounting Standards Update 2016-13 [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 0.1 |
Deferred Tax Asset [Domain] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Balance as of December 31, 2019 - Prior to Adoption of ASU 2016-13 |  | 138.1
Balance as of January 1, 2020 - Subsequent to Adoption of ASU 2016-13 | 138.6 |
Deferred Tax Asset [Domain] | Accounting Standards Update 2016-13 [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | (0.5) |
Retained Earnings [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Balance as of December 31, 2019 - Prior to Adoption of ASU 2016-13 |  | $ 2,372.4
Balance as of January 1, 2020 - Subsequent to Adoption of ASU 2016-13 | 2,371.2 |
Retained Earnings [Member] | Accounting Standards Update 2016-13 [Member] |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | $ 1.2 |

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