Document and Entity Information
May 28, 2020
Document And Entity Information [Line Items]  
Amendment Flag false
Entity Central Index Key 0001668428
Document Type 8-K
Document Period End Date May 28, 2020
Entity Registrant Name FGL HOLDINGS
Entity Incorporation State Country Code E9
Entity File Number 001-37779
Entity Tax Identification Number 98-1354810
Entity Address, Address Line One 4th Floor
Entity Address, Address Line Two Boundary Hall
Entity Address, Address Line Three Cricket Square
Entity Address, City or Town Grand Cayman
Entity Address, Region Grand Cayman
Entity Address, Country KY
Entity Address, Postal Zip Code KY1-1102
Entity Address, State or Province KY
City Area Code 1 (345)
Local Phone Number 947-5614
Written Communications true
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Fair Value Measured at Net Asset Value Per Share [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Ordinary shares, par value $.0001 per share
Trading Symbol FG
Security Exchange Name NYSE
Ordinary Shares Par Value .0001 Per Share [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Warrants to purchase ordinary shares
Trading Symbol FG WS
Security Exchange Name NYSE