v3.19.2
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2019
Jul. 31, 2019
Cover page.    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Entity Registrant Name HC2 HOLDINGS, INC.  
Entity Central Index Key 0001006837  
Current Fiscal Year End Date --12-31  
Entity Emerging Growth Company false  
Entity Smaller Reporting Company false  
Entity Filer Category Accelerated Filer  
Entity Common Stock, Shares Outstanding (in shares)   45,850,584
Entity Shell Company false  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes