XML 77 R63.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Reinsurance (Funds Withheld Assets) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Reinsurance Funds Withheld Assets [Line Items] |  |
Funds withheld at interest | $ 5,642 | $ 5,683
Fixed Maturities [Member] |  |
Reinsurance Funds Withheld Assets [Line Items] |  |
Funds withheld at interest | 2,380 | 2,442
Equity securities |  |
Reinsurance Funds Withheld Assets [Line Items] |  |
Funds withheld at interest | 2 | 2
Mortgage Loans on Real Estate [Member] |  |
Reinsurance Funds Withheld Assets [Line Items] |  |
Funds withheld at interest | 437 | 451
Funds withheld at interest |  |
Reinsurance Funds Withheld Assets [Line Items] |  |
Funds withheld at interest | 1,515 | 1,545
Partnership |  |
Reinsurance Funds Withheld Assets [Line Items] |  |
Funds withheld at interest | 36 | 35
Short-term Investments [Member] |  |
Reinsurance Funds Withheld Assets [Line Items] |  |
Funds withheld at interest | 31 | 30
Accrued Income Receivable |  |
Reinsurance Funds Withheld Assets [Line Items] |  |
Funds withheld at interest | 28 | 28
Other Assets |  |
Reinsurance Funds Withheld Assets [Line Items] |  |
Funds withheld at interest | 0 | 1
Assets |  |
Reinsurance Funds Withheld Assets [Line Items] |  |
Funds withheld at interest | $ 4,429 | $ 4,534

X
- Definition Reinsurance Funds Withheld Assets [Line Items] + References No definition available. + Details
Name: | rga_ReinsuranceFundsWithheldAssetsLineItems
Namespace Prefix: | rga_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of the reinsurer's funds held on its behalf by the ceding insurer, including funds held in trust, under reinsurance treaties or contracts with the assuming insurer as security for the payment of the obligations thereunder. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(10)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
Name: | us-gaap_FundsHeldUnderReinsuranceAgreementsAsset
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | rga_MajorCategoryOfInvestmentsAxis=us-gaap_FixedMaturitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rga_MajorCategoryOfInvestmentsAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rga_MajorCategoryOfInvestmentsAxis=us-gaap_MortgagesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rga_MajorCategoryOfInvestmentsAxis=rga_FundsWithheldAtInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rga_MajorCategoryOfInvestmentsAxis=us-gaap_PartnershipMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rga_MajorCategoryOfInvestmentsAxis=us-gaap_ShortTermInvestmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rga_MajorCategoryOfInvestmentsAxis=us-gaap_AccruedIncomeReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rga_MajorCategoryOfInvestmentsAxis=us-gaap_OtherAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | rga_MajorCategoryOfInvestmentsAxis=us-gaap_AssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |