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Organization and Business (Details) - segment	3 Months Ended
	Mar. 31, 2021	May 12, 2020	Oct. 30, 2019
Business And Organization [Line Items]
Number of reportable segments	4
DBMG
Business And Organization [Line Items]
Parents interest, controlling	92.00%
Genoval Orthopedics inc.
Business And Organization [Line Items]
Parents interest, controlling	80.00%
R2 Dermatology, Inc.
Business And Organization [Line Items]
Parents interest, controlling	51.00%
Medibeacon Inc., and Triple Ring Technologies, Inc
Business And Organization [Line Items]
Parents interest, controlling	47.00%
HC2 Broadcasting Holdings, Inc
Business And Organization [Line Items]
Parents interest, controlling	98.00%
DTV America
Business And Organization [Line Items]
Parents interest, controlling	57.00%
Minority Holders
Business And Organization [Line Items]
Percentage of proxy and voting rights from minority holders	19.00%
Insurance Companies
Business And Organization [Line Items]
Parents interest, controlling	100.00%
Marine Services
Business And Organization [Line Items]
Parents interest, controlling	73.00%	30.00%	49.00%
HMN
Business And Organization [Line Items]
Parents interest, controlling	19.00%

X

- Definition

Business And Organization [Line Items]

+ References

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- Definition

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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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8672-108599

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