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PROPERTY, PLANT AND EQUIPMENT (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Property, Plant and Equipment [Line Items] |  |  |
Depreciation | $ 76.6 | $ 65.6 | $ 65.8
Interest capitalized | 24.8 | 6.5 |
Depletion | 7.5 | 7.4 | $ 6.8
Other Noncurrent Assets [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Deposits for Property, Plant and Equipment | $ 34.0 | $ 83.0 |

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- Definition Amount of interest capitalized during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
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