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DEBT - Debt Maturities and Debt Issuance Costs (Details) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Debt Issuance Costs
Unamortized debt issuance costs	$ 10.7	$ 11.1

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- References

No definition available.

+ Details

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- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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