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OTHER INFORMATION - Narrative (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($)
Debt Instrument [Line Items] |
Expenses incurred related to capital structure | $ 41.8
Letter of credit |
Debt Instrument [Line Items] |
Letters of credit outstanding | 24.7
Cash collateral | $ 25.4

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- Definition Restructuring Costs, Negotiations With Lenders And Other Activities + References No definition available. + Details
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- Definition Amount of assets pledged to secure a debt instrument. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 + Details
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- Details
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