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Summary of Investments Other Than Investments in Related Parties (Tables) | 12 Months Ended
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Dec. 31, 2021
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract] |
Summary Of Investments Other Than Investments In Related Parties [Table Text Block] | REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE I-SUMMARY OF INVESTMENTS-OTHER THAN INVESTMENTS IN RELATED PARTIES December 31, 2021 (in millions)
Type of Investment |  | Amortized Cost |  | Estimated Fair Value |  | Amount at Which Shown in the Balance Sheets(1)
Fixed maturity securities: |  |  |  |  |  |
United States government and government agencies and authorities |  | $ | 2,082 |  |  | $ | 2,105 |  |  | $ | 2,105 |
State and political subdivisions |  | 1,191 |  |  | 1,323 |  |  | 1,323 |
Foreign governments(2) |  | 10,527 |  |  | 12,314 |  |  | 12,314 |
Public utilities |  | 4,281 |  |  | 4,683 |  |  | 4,683 |
Mortgage-backed and asset-backed securities |  | 6,834 |  |  | 6,904 |  |  | 6,904 |
All other corporate bonds |  | 30,958 |  |  | 33,420 |  |  | 33,420 |
Total fixed maturity securities |  | $ | 55,873 |  |  | $ | 60,749 |  |  | $ | 60,749 |
Equity securities |  | $ | 176 |  |  | $ | 151 |  |  | $ | 151 |
Mortgage loans on real estate |  | 6,283 |  |  |  |  | 6,283 |
Policy loans |  | 1,234 |  |  |  |  | 1,234 |
Funds withheld at interest |  | 6,954 |  |  |  |  | 6,954 |
Short-term investments |  | 87 |  |  |  |  | 87 |
Other invested assets |  | 3,070 |  |  |  |  | 3,070 |
Total investments |  | $ | 73,677 |  |  |  |  | $ | 78,528 |
(1)Fixed maturity securities are classified as available-for-sale and carried at fair value. (2)Includes fixed maturities directly issued by foreign governments, supranational and foreign government-sponsored enterprises.

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