v3.22.2.2
Document and Entity Information Document
Nov. 07, 2022
Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Nov. 07, 2022
Entity Registrant Name METLIFE, INC.
Entity Central Index Key 0001099219
Amendment Flag false
Entity Incorporation, State or Country Code DE
Entity File Number 1-15787
Entity Tax Identification Number 13-4075851
Entity Address, Address Line One 200 Park Avenue,
Entity Address, City or Town New York,
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10166-0188
City Area Code 212
Local Phone Number 578-9500
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock  
Entity Information [Line Items]  
Title of 12(b) Security Common Stock, par value $0.01
Trading Symbol MET
Security Exchange Name NYSE
Series A Preferred Stock  
Entity Information [Line Items]  
Title of 12(b) Security Floating Rate Non-Cumulative Preferred Stock,Series A, par value $0.01
Trading Symbol MET PRA
Security Exchange Name NYSE
Series E Preferred Stock  
Entity Information [Line Items]  
Title of 12(b) Security Depositary Shares, each representing a 1/1,000thinterest in a share of 5.625% Non-Cumulative Preferred Stock, Series E
Trading Symbol MET PRE
Security Exchange Name NYSE
Series F Preferred Stock [Member]  
Entity Information [Line Items]  
Title of 12(b) Security Depositary Shares, each representing a 1/1,000thinterest in a share of 4.75% Non-CumulativePreferred Stock, Series F
Trading Symbol MET PRF
Security Exchange Name NYSE