0000898174-21-000022 | 10-Q | XBRL Viewer | Reinsurance Group OF America INC

Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2021	Jul. 31, 2021
Document Information [Line Items]
Amendment Flag	false
Entity Common Stock, Shares Outstanding		67,996,937
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Document Transition Report	false
Entity Incorporation, State or Country Code	MO
Entity Tax Identification Number	43-1627032
Entity File Number	1-11848
Entity Shell Company	false
Document Quarterly Report	true
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Document Period End Date	Jun. 30, 2021
Document Type	10-Q
Entity Central Index Key	0000898174
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Entity Registrant Name	REINSURANCE GROUP OF AMERICA, INCORPORATED

Document and Entity Information Address	6 Months Ended
Jun. 30, 2021
Entity Addresses [Line Items]
City Area Code	636
Local Phone Number	736-7000
Entity Address, Address Line One	16600 Swingley Ridge Road
Entity Address, City or Town	Chesterfield
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63017

Label

Element

Value

Liability For Expected Credit Losses Included in Other Liabilities

rga_LiabilityForExpectedCreditLossesIncludedinOtherLiabilities

$ 1,000,000

Liability For Expected Credit Losses Included in Other Liabilities

rga_LiabilityForExpectedCreditLossesIncludedinOtherLiabilities

2,000,000

Fair Value Measured On Recurring Basis Short Term Investments

rga_FairValueMeasuredOnRecurringBasisShortTermInvestments

166,000,000

Fair Value Measured On Recurring Basis Short Term Investments

rga_FairValueMeasuredOnRecurringBasisShortTermInvestments

1,000,000

Fair Value Measured On Recurring Basis Short Term Investments

rga_FairValueMeasuredOnRecurringBasisShortTermInvestments

165,000,000

Fair Value Measured On Recurring Basis Short Term Investments

rga_FairValueMeasuredOnRecurringBasisShortTermInvestments

Fair Value Measured On Recurring Basis Short Term Investments

rga_FairValueMeasuredOnRecurringBasisShortTermInvestments

197,000,000

Fair Value Measured On Recurring Basis Short Term Investments

rga_FairValueMeasuredOnRecurringBasisShortTermInvestments

32,000,000

Fair Value Measured On Recurring Basis Short Term Investments

rga_FairValueMeasuredOnRecurringBasisShortTermInvestments

150,000,000

Fair Value Measured On Recurring Basis Short Term Investments

rga_FairValueMeasuredOnRecurringBasisShortTermInvestments

15,000,000

Derivative Fair Value Of Free Standing Derivative Liability

rga_DerivativeFairValueOfFreeStandingDerivativeLiability

75,000,000

Derivative Fair Value Of Free Standing Derivative Liability

rga_DerivativeFairValueOfFreeStandingDerivativeLiability

80,000,000

Adoption of New Accounting Standard Current Expected Credit Losses

rga_AdoptionofNewAccountingStandardCurrentExpectedCreditLosses

$ 15,000,000

Stock Based Compensation Shares

rga_StockBasedCompensationShares

^[1]

Stock Based Compensation Shares

rga_StockBasedCompensationShares

40,036

^[1]

Stock Based Compensation Shares

rga_StockBasedCompensationShares

40,036

^[1]

Stock Based Compensation Shares

rga_StockBasedCompensationShares

^[1]

Stock Based Compensation Shares

rga_StockBasedCompensationShares

181,330

^[1]

Stock Based Compensation Shares

rga_StockBasedCompensationShares

181,330

^[1]

Collateral Financing Expense

rga_CollateralFinancingExpense

$ 2,000,000

Collateral Financing Expense

rga_CollateralFinancingExpense

4,000,000

Collateral Financing Expense

rga_CollateralFinancingExpense

5,000,000

Collateral Financing Expense

rga_CollateralFinancingExpense

10,000,000

Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives

rga_GainLossOnInvestmentsRelatedToChangeInFairValueOfDerivativesExcludingEmbeddedDerivatives

30,000,000

Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives

rga_GainLossOnInvestmentsRelatedToChangeInFairValueOfDerivativesExcludingEmbeddedDerivatives

(23,000,000)

Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives

rga_GainLossOnInvestmentsRelatedToChangeInFairValueOfDerivativesExcludingEmbeddedDerivatives

(21,000,000)

Gain Loss On Investments Related To Change In Fair Value Of Derivatives Excluding Embedded Derivatives

rga_GainLossOnInvestmentsRelatedToChangeInFairValueOfDerivativesExcludingEmbeddedDerivatives

100,000,000

Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives

rga_FairValueMeasuredOnRecurringBasisFundsHeldUnderReinsuranceAgreementsAssetEmbeddedDerivatives

206,000,000

Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives

rga_FairValueMeasuredOnRecurringBasisFundsHeldUnderReinsuranceAgreementsAssetEmbeddedDerivatives

Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives

rga_FairValueMeasuredOnRecurringBasisFundsHeldUnderReinsuranceAgreementsAssetEmbeddedDerivatives

Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives

rga_FairValueMeasuredOnRecurringBasisFundsHeldUnderReinsuranceAgreementsAssetEmbeddedDerivatives

206,000,000

Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives

rga_FairValueMeasuredOnRecurringBasisFundsHeldUnderReinsuranceAgreementsAssetEmbeddedDerivatives

114,000,000

Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives

rga_FairValueMeasuredOnRecurringBasisFundsHeldUnderReinsuranceAgreementsAssetEmbeddedDerivatives

Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives

rga_FairValueMeasuredOnRecurringBasisFundsHeldUnderReinsuranceAgreementsAssetEmbeddedDerivatives

Fair Value Measured On Recurring Basis Funds Held Under Reinsurance Agreements Asset Embedded Derivatives

rga_FairValueMeasuredOnRecurringBasisFundsHeldUnderReinsuranceAgreementsAssetEmbeddedDerivatives

114,000,000

Derivative Fair Value Of Free Standing Derivative Asset

rga_DerivativeFairValueOfFreeStandingDerivativeAsset

177,000,000

Derivative Fair Value Of Free Standing Derivative Asset

rga_DerivativeFairValueOfFreeStandingDerivativeAsset

171,000,000

Other Impairment Losses And Change In Mortgage Loan Provision

rga_OtherImpairmentLossesAndChangeInMortgageLoanProvision

(3,000,000)

Other Impairment Losses And Change In Mortgage Loan Provision

rga_OtherImpairmentLossesAndChangeInMortgageLoanProvision

22,000,000

Other Impairment Losses And Change In Mortgage Loan Provision

rga_OtherImpairmentLossesAndChangeInMortgageLoanProvision

(21,000,000)

Other Impairment Losses And Change In Mortgage Loan Provision

rga_OtherImpairmentLossesAndChangeInMortgageLoanProvision

35,000,000

Gains Losses Deferred In Accumulated Other Comprehensive Income Loss On Derivatives Effective Portion