REVENUES FROM CONTRACTS WITH CUSTOMERS - Schedule of Total Contract Acquisition Costs (Detail) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Disaggregation Of Revenue [Line Items]
Total contract acquisition costs	$ 33.8	$ 31.8
Other Current Assets
Disaggregation Of Revenue [Line Items]
Total contract acquisition costs	8.3	8.5
Other Noncurrent Assets
Disaggregation Of Revenue [Line Items]
Total contract acquisition costs	$ 25.5	$ 23.3

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054

Name:	us-gaap_CapitalizedContractCostNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant