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Commitments Contingencies and Guarantees (Tables) | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Fair Value, Off-balance Sheet Risks [Table Text Block] | The Company’s commitments to fund investments as of December 31, 2020 and 2019 are presented in the following table (dollars in millions):
| 2020 |  | 2019
Limited partnership interests and joint ventures | $ | 678 |  |  | $ | 685 |
Mortgage loans on real estate | 199 |  |  | 243 |
Bank loans and private placements | 194 |  |  | 181 |
Lifetime mortgages | 43 |  |  | 87 |
Other Commitments [Table Text Block] | The following table presents the maximum potential obligation for these commitments as of December 31, 2020 (dollars in millions):
Commitment Period |  | Maximum Potential Obligation
2034 |  | $ | 1,243 |
2035 |  | 2,666 |
2036 |  | 3,599 |
2037 |  | 2,850 |
2038 |  | 2,300 |
2039 |  | 11,350 |
Schedule of Guarantor Obligations [Table Text Block] | RGA’s guarantees issued as of December 31, 2020 and 2019 are reflected in the following table (dollars in millions):
| 2020 |  | 2019
Treaty guarantees | $ | 1,934 |  |  | $ | 1,821 |
Treaty guarantees, net of assets in trust | 961 |  |  | 891 |
Securities borrowing and repurchase arrangements | 133 |  |  | 275 |
Financing arrangements | — |  |  | 42 |

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- Definition Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined) which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13467-108611 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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- Definition Tabular disclosure of each guarantee obligation, or each group of similar guarantee obligations, including (a) the nature of the guarantee, including its term, how it arose, and the events or circumstances that would require the guarantor to perform under the guarantee; (b) the maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee; (c) the current carrying amount of the liability, if any, for the guarantor's obligations under the guarantee; and (d) the nature of any recourse provisions under the guarantee, and any assets held either as collateral or by third parties, and any relevant related party disclosure. Excludes disclosures about product warranties. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12265-110248 + Details
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