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Document and Entity Information
Dec. 01, 2025
Entity Information [Line Items]  
Document Type 8-K
Document Period End Date Dec. 01, 2025
Entity Registrant Name REINSURANCE GROUP OF AMERICA, INCORPORATED
Entity Incorporation State Country Code MO
Entity File Number 1-11848
Entity Tax Identification Number 43-1627032
Entity Address Address Line 1 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
Amendment Flag false
Entity Central Index Key 0000898174
Common Stock, par value $0.01 [Member]  
Entity Information [Line Items]  
Security 12b Title Common Stock, par value $0.01
Trading Symbol RGA
Security Exchange Name NYSE
5.75% Fixed-To-Floating Rate Subordinated Debentures due 2056 [Member]  
Entity Information [Line Items]  
Security 12b Title 5.75% Fixed-To-Floating Rate Subordinated Debentures due 2056
Trading Symbol RZB
Security Exchange Name NYSE
7.125% Fixed-Rate Reset Subordinated Debentures due 2052 [Member]  
Entity Information [Line Items]  
Security 12b Title 7.125% Fixed-Rate Reset Subordinated Debentures due 2052
Trading Symbol RZC
Security Exchange Name NYSE