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Quarterly report pursuant to Section 13 or 15(d)

REVENUE (Deferred Revenue) (Details)

v3.10.0.1
REVENUE (Deferred Revenue) (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Deferred Revenue Arrangement [Line Items] Ìý Ìý
Deferred revenue, current $ 20.0 $ 23.8
Deferred revenue, noncurrent 47.1 $ 51.4
Other Current Liabilities [Member] Ìý Ìý
Deferred Revenue Arrangement [Line Items] Ìý Ìý
Deferred Revenue, Period Increase (Decrease) (3.8) Ìý
Other Noncurrent Liabilities [Member] Ìý Ìý
Deferred Revenue Arrangement [Line Items] Ìý Ìý
Deferred Revenue, Period Increase (Decrease) $ (4.3) Ìý