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REVENUE Revenue Textuals (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) | Jun. 30, 2018 USD ($)
Net Contract Liability, Change from Prior Year |  | $ (16.6)
Net Contract Liability, Percentage Change from Prior Period |  | 89.70%
Capitalized Contract Cost, Net | $ 7.1 | $ 7.1
Contract with Customer, Liability, Revenue Recognized | 15.2 | 46.1
Capitalized Contract Cost, Amortization | 0.2 | 0.4
Long-term Contract with Customer [Member] |  |
Revenue, Remaining Performance Obligation, Amount | 44.4 | 44.4
Long-term Contract with Customer [Member] | Minimum [Member] |  |
Revenue, Remaining Performance Obligation, Amount | 15.0 | 15.0
Long-term Contract with Customer [Member] | Maximum [Member] |  |
Revenue, Remaining Performance Obligation, Amount | $ 20.0 | $ 20.0
Revenue on Service and Repair Contracts [Member] |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 3.00%

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