XML 63 R52.htm IDEA: XBRL DOCUMENT
v3.25.3

Future Policy Benefits (Assumption Explanations) (Details) - Other Segments - USD ($) | Sep. 30, 2025 | Sep. 30, 2024
--- | --- | ---
Life Insurance Product Line [Member] | Americas [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | $ 15,400,000,000 | $ 12,500,000,000
Future Policy Benefits Actual To Expected Variance | (61,000,000) | (113,000,000)
Impact Of Updating Discount Rate Recognized In OCI | (375,000,000) | 7,000,000
Changes In Cash Flow Assumptions | 29,000,000 | 31,000,000
Life Insurance Product Line [Member] | CANADA |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 3,600,000,000 | 3,600,000,000
Future Policy Benefits Actual To Expected Variance | (3,000,000) | (6,000,000)
Impact Of Updating Discount Rate Recognized In OCI | (152,000,000) | 134,000,000
Changes In Cash Flow Assumptions | 9,000,000 | 28,000,000
Life Insurance Product Line [Member] | EMEA [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 1,900,000,000 | 1,500,000,000
Future Policy Benefits Actual To Expected Variance | 10,000,000 | 4,000,000
Impact Of Updating Discount Rate Recognized In OCI | 243,000,000 | 109,000,000
Changes In Cash Flow Assumptions | 223,000,000 | 25,000,000
Life Insurance Product Line [Member] | Asia Pacific [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 5,300,000,000 | 4,900,000,000
Future Policy Benefits Actual To Expected Variance | 65,000,000 | (89,000,000)
Impact Of Updating Discount Rate Recognized In OCI | (49,000,000) | 171,000,000
Changes In Cash Flow Assumptions | 2,000,000 | 73,000,000
Insurance, Other | Americas [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 10,000,000,000 | 8,100,000,000
Future Policy Benefits Actual To Expected Variance | (3,000,000) | (3,000,000)
Impact Of Updating Discount Rate Recognized In OCI | (260,000,000) | (124,000,000)
Changes In Cash Flow Assumptions | 0 | 8,000,000
Insurance, Other | CANADA |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 4,600,000,000 | 4,100,000,000
Future Policy Benefits Actual To Expected Variance | 0 | 0
Impact Of Updating Discount Rate Recognized In OCI | (135,000,000) | (168,000,000)
Changes In Cash Flow Assumptions | 0 | 0
Insurance, Other | EMEA [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 10,100,000,000 | 7,000,000,000
Future Policy Benefits Actual To Expected Variance | 19,000,000 | 1,000,000
Impact Of Updating Discount Rate Recognized In OCI | 128,000,000 | 241,000,000
Changes In Cash Flow Assumptions | 24,000,000 | 3,000,000
Insurance, Other | Asia Pacific [Member] |  |
Liability for Future Policy Benefit, by Product Segment [Line Items] |  |
Net Liability For Future Policy Benefits At Original Discount Rate | 15,500,000,000 | 12,700,000,000
Future Policy Benefits Actual To Expected Variance | 6,000,000 | 1,000,000
Impact Of Updating Discount Rate Recognized In OCI | (1,500,000) | (540,000,000)
Changes In Cash Flow Assumptions | $ 0 | $ 9,000,000

X
- Definition Changes In Cash Flow Assumptions + References No definition available. + Details
Name: | rga_ChangesInCashFlowAssumptions
Namespace Prefix: | rga_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Future Policy Benefits Actual To Expected Increase Decrease + References No definition available. + Details
Name: | rga_FuturePolicyBenefitsActualToExpectedIncreaseDecrease
Namespace Prefix: | rga_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Increase Decrease Impact Of Updating Discount Rate Recognized In OCI + References No definition available. + Details
Name: | rga_IncreaseDecreaseImpactOfUpdatingDiscountRateRecognizedInOCI
Namespace Prefix: | rga_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Net Liability For Future Policy Benefits At Original Discount Rate + References No definition available. + Details
Name: | rga_NetLiabilityForFuturePolicyBenefitsAtOriginalDiscountRate
Namespace Prefix: | rga_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LiabilityForFuturePolicyBenefitByProductSegmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_LifeInsuranceSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=srt_AmericasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=us-gaap_AllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=us-gaap_EMEAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=srt_AsiaPacificMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_OtherInsuranceProductLineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |