DISCONTINUED OPERATIONS - depreciation, amortization and capitalized expenditures (Details) $ in Millions	12 Months Ended
Dec. 31, 2017 USD ($)
DISCONTINUED OPERATIONS
Depreciation	$ 2.5
Amortization	55.0
Capital expenditures	$ 0.6

Amount of capital expenditure attributable to discontinued operations.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 5B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109222650&loc=SL51721673-107760

Name:	us-gaap_CapitalExpenditureDiscontinuedOperations
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration