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CAPITAL CONSTRUCTION FUND (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Maximum period to commit fund deposits for qualified purposes | 25 years |
Period over which deposits will be treated as non-qualified withdrawals | 5 years |
Capital construction fund - cash on deposit |  | $ 0.9
Accounts receivable, net | $ 223.7 | 194.6
Eligible Accounts Receivable Assigned to CCF |  |
Accounts receivable, net | $ 1.0 | 134.8
Long-term Assets | Cash |  |
Capital construction fund - cash on deposit |  | $ 0.9

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