v3.22.2.2
Document and Entity Information
Oct. 25, 2022
Document And Entity Information [Line Items]  
Entity Registrant Name REINSURANCE GROUP OF AMERICA INC
Amendment Flag false
Entity Central Index Key 0000898174
Document Type 8-K
Document Period End Date Oct. 25, 2022
Entity Incorporation State Country Code MO
Entity File Number 1-11848
Entity Tax Identification Number 43-1627032
Entity Address, Address Line One 16600 Swingley Ridge Road
Entity Address, City or Town Chesterfield
Entity Address, State or Province MO
Entity Address, Postal Zip Code 63017
City Area Code (636)
Local Phone Number 736-7000
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock Outstanding [Member]  
Document And Entity Information [Line Items]  
Security 12b Title Common Stock, par value $0.01
Trading Symbol RGA
Security Exchange Name NYSE
Subordinated Debt [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 6.20% Fixed-To-Floating Rate Subordinated Debentures due 2042
Trading Symbol RZA
Security Exchange Name NYSE
M 5.75 Fixed To Floating Rate Subordinated Debentures Due 2056 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 5.75% Fixed-To-Floating Rate Subordinated Debentures due 2056
Trading Symbol RZB
Security Exchange Name NYSE
M 7.125 Fixed Rate Reset Subordinated Debentures Due 20521 [Member]  
Document And Entity Information [Line Items]  
Security 12b Title 7.125% Fixed-Rate Reset Subordinated Debentures due 2052
Trading Symbol RZC
Security Exchange Name NYSE