Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

ACQUISITION AND DISPOSITION (Details) - 3 months ended Mar. 31, 2019 - Subsequent Event [Member] £ in Millions, $ in Millions	USD ($)	GBP (£)
Eastern Airways [Member]
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Consideration Paid \| £		£ 17.1
Columbia Helicopters, Inc [Member]
Business Acquisition [Line Items]
Cash Outflow for Termination of Business Acquisition \| $	$ 20