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RESTRUCTURING AND OTHER COSTS - ADDITIONAL INFORMATION (Details) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2019 USD ($) | Jun. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jun. 30, 2017 USD ($) | Dec. 31, 2019 USD ($) segment | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Nov. 30, 2018 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring costs |  |  |  |  | $ 33.5 | $ 32.1 | $ 55.4 |
Number of operating segments | segment |  |  |  |  | 2 |  |  |
Asset impairment charges |  |  |  |  | $ 47.2 |  |  |
Fixed asset impairment |  |  |  |  | 33.4 | 0.0 | 0.0 |
Impairment of intangible assets |  |  |  |  | 9.1 |  |  |
Other costs of restructuring |  |  |  |  |  | 188.9 |  |
Indefinite-lived intangible asset impairment | $ 5.3 | $ 179.2 | $ 266.9 | $ 79.8 | 5.3 | 179.2 | 346.7 |
Litigation Settlement, Expense |  |  |  |  |  | 9.7 | 23.1 |
Settlements of legal matters and impairment of long-term assets |  |  |  |  |  |  | 369.8 |
Technologies & Equipment |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Fixed asset impairment |  |  |  |  | $ 32.8 |  |  |
Indefinite-lived intangible asset impairment |  |  |  |  |  | $ 179.2 | 346.7 |
One time expenditures |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Expected cost |  |  |  |  |  |  |  | $ 275.0
2017 Plans |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |
Restructuring costs |  |  |  |  |  |  | 29.0 |
Expected cost |  |  | $ 65.0 |  |  |  | $ 65.0 |

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