XML 92 R82.htm IDEA: XBRL DOCUMENT
v3.23.3

Investments Investments (Allowance for Credit Loss Roll Forward) (Details) - Available-for-sale Securities [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Beginning Balance | $ 75 | $ 55 | $ 37 | $ 31
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | (7) | (45) | (31)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold |  | (5) | (10) | (12)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status |  | 4 |  | 4
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses | (1) | (1) | (2) | (6)
Other Than Temporary Impairment Credit Losses Recognized In Earnings Write Offs | 6 |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Ending Balance | 68 | 52 | 68 | 52
Corporate Debt Securities [Member] |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Beginning Balance | 62 | 43 | 27 | 26
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | (8) | (44) | (26)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold |  | (3) | (10) | (9)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status |  | 4 |  | 4
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses | (1) | (1) | 0 | (4)
Other Than Temporary Impairment Credit Losses Recognized In Earnings Write Offs | 6 |  | 6 |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Ending Balance | 55 | 43 | 55 | 43
Asset-backed Securities [Member] |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Beginning Balance | 12 | 5 | 10 | 0
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | (1) | 0 | (4)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold |  | 0 | 0 | 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status |  | 0 |  | 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses | 0 | 0 | (2) | 0
Other Than Temporary Impairment Credit Losses Recognized In Earnings Write Offs | 0 |  | 0 |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Ending Balance | 12 | 4 | 12 | 4
Commercial Mortgage Backed Securities [Member] |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Beginning Balance | 1 | 1 | 0 | 1
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 0 | (1) | 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold |  | 0 | 0 | 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status |  | 0 |  | 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses | 0 | 0 | 0 | 0
Other Than Temporary Impairment Credit Losses Recognized In Earnings Write Offs | 0 |  | 0 |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Ending Balance | 1 | 1 | 1 | 1
Debt Security, Government, Non-US [Member] |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Roll Forward] |  |  |  |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Beginning Balance | 0 | 6 | 0 | 4
Financing Receivable, Allowance for Credit Loss, Purchased with Credit Deterioration, Increase |  | 0 | 0 | (1)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Securities Sold |  | (2) | 0 | (3)
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Reductions, Change in Status |  | 0 |  | 0
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Additions, Additional Credit Losses | 0 | 0 | 0 | (2)
Other Than Temporary Impairment Credit Losses Recognized In Earnings Write Offs | 0 |  | 0 |
Other than Temporary Impairment, Credit Losses Recognized in Earnings, Credit Losses on Debt Securities Held, Ending Balance | $ 0 | $ 4 | $ 0 | $ 4

X
- Definition Other Than Temporary Impairment Credit Losses Recognized In Earnings Write Offs + References No definition available. + Details
Name: | rga_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsWriteOffs
Namespace Prefix: | rga_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This item represents an increase to the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security held for which a previous OTTI was recognized and the investor does not intend to sell the debt security and it is not more likely than not that the investor will be required to sell the debt security before recovery of its amortized cost basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8B -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-8B + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition This item represents an increase to the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security held for which no such other than temporary impairment (OTTI) was previously recognized. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-8B + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-8B Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8B -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-8B + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents reductions in the amount of cumulative losses recognized in earnings for other than temporary impairments (OTTI) for which a portion of the impairment had been recognized in other comprehensive income (a component of shareholders' equity) due to a change in status of the impaired security because of a change in the entity's intent to either sell the impaired security or it has become more likely than not that the entity will be required to sell the security before recovery of its cost basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-8B + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition This item represents reductions in the cumulative amount of credit losses recognized in earnings for an other than temporary impairment (OTTI) of a debt security because of the sale of impaired securities during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8B -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-8B + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_InformationByCategoryOfDebtSecurityAxis=us-gaap_AvailableforsaleSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |