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ACQUISITION - PURCHASE PRICE ALLOCATION (Details) - Bluewater $ in Millions | 1 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) | Jun. 30, 2017 USD ($)
Business Acquisition [Line Items] |  |
Current assets | $ 2.0 | $ 2.0
Net property, plant, and equipment | 217.6 | 217.6
Goodwill | 7.3 | 7.3
Current liabilities | (0.9) | $ (0.9)
Total purchase price | $ 226.0 |

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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 + Details
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