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Organization and Business (Details)	9 Months Ended
	Sep. 30, 2018 segment
Business And Organization [Line Items]
Number of reportable segments	8
DBMG
Business And Organization [Line Items]
Parents controlling interest	92.00%
GMSL
Business And Organization [Line Items]
Parents controlling interest	72.00%
ANG
Business And Organization [Line Items]
Parents controlling interest	68.00%
ICS
Business And Organization [Line Items]
Parents controlling interest	100.00%
CGI
Business And Organization [Line Items]
Parents controlling interest	100.00%
Genoval Orthopedics inc.
Business And Organization [Line Items]
Parents controlling interest	80.00%
R2 Dermatology, Inc.
Business And Organization [Line Items]
Parents controlling interest	74.00%
Medibeacon Inc., and Triple Ring Technologies, Inc
Business And Organization [Line Items]
Parents controlling interest	50.00%
HC2 Broadcasting Holdings, Inc
Business And Organization [Line Items]
Parents controlling interest	98.00%
DTV America
Business And Organization [Line Items]
Parents controlling interest	49.00%
Percentage of proxy and voting rights from minority holders	10.00%

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- Definition

Business And Organization [Line Items]

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The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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