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Summary of Investments Other Than Investments in Related Parties | 12 Months Ended
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Dec. 31, 2018
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 | REINSURANCE GROUP OF AMERICA, INCORPORATED SCHEDULE I-SUMMARY OF INVESTMENTS-OTHER THAN INVESTMENTS IN RELATED PARTIES December 31, 2018 (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 |  | $ | 2,234 |  |  | $ | 2,186 |  |  | $ | 2,186 |
State and political subdivisions |  | 721 |  |  | 752 |  |  | 752 |
Foreign governments(2) |  | 6,449 |  |  | 7,635 |  |  | 7,635 |
Public utilities |  | 2,876 |  |  | 2,909 |  |  | 2,909 |
Mortgage-backed and asset-backed securities |  | 5,472 |  |  | 5,437 |  |  | 5,437 |
All other corporate bonds |  | 21,130 |  |  | 21,073 |  |  | 21,073 |
Total fixed maturity securities |  | $ | 38,882 |  |  | $ | 39,992 |  |  | $ | 39,992 |
Equity securities |  | $ | 108 |  |  | $ | 82 |  |  | $ | 82 |
Mortgage loans on real estate |  | 4,966 |  |  |  |  | 4,966 |
Policy loans |  | 1,345 |  |  |  |  | 1,345 |
Funds withheld at interest |  | 5,762 |  |  |  |  | 5,762 |
Short-term investments |  | 143 |  |  |  |  | 143 |
Other invested assets |  | 1,915 |  |  |  |  | 1,915 |
Total investments |  | $ | 53,121 |  |  |  |  | $ | 54,205 |
(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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- Definition The entire disclosure of information about investment held by insurance company, excluding investment in related party. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 15 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -Section S99 -Paragraph 7 -Subparagraph (SX 210.12-15) -URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611379-123010 + Details
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