v3.19.3
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Nov. 01, 2019
Document and Entity Information [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity File Number 001-37905  
Entity Central Index Key 0001685040  
Entity Registrant Name Brighthouse Financial, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 81-3846992  
Entity Address, Address Line One 11225 North Community House Road,  
Entity Address, City or Town Charlotte,  
Entity Address, State or Province NC  
Entity Address, Postal Zip Code 28277  
City Area Code 980  
Local Phone Number 365-7100  
Entity Listings [Line Items]    
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   107,943,076
6.250% Junior Subordinated Debentures due 2058    
Entity Listings [Line Items]    
Title of 12(b) Security 6.250% Junior Subordinated Debentures due 2058  
Trading Symbol BHFAL  
Security Exchange Name NASDAQ  
Common Stock, par value $0.01 per share    
Entity Listings [Line Items]    
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol BHF  
Security Exchange Name NASDAQ  
Depositary Shares, each representing a 1/1,000th interest in a share of 6.600% Non-Cumulative Preferred Stock, Series A    
Entity Listings [Line Items]    
Title of 12(b) Security Depositary Shares, each representing a 1/1,000th interest in a share  
Trading Symbol BHFAP  
Security Exchange Name NASDAQ