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Debt (Debt Redemption Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Debt Disclosure [Abstract]
Debt Instrument, Redemption, Description	On September 15, 2022, RGA announced a cash tender offer for any and all of its outstanding 6.20% Fixed-to-Floating Rate Subordinated Debentures due 2042 (the “2042 Debentures”) at a price of $25.20 for each $25 principal amount of the 2042 Debentures. The tender offer expired on September 22, 2022, and a total of $151 million, or approximately 38%, of the aggregate principal amount of the 2042 Debentures were tendered. The Company intends to redeem the remaining debentures in accordance with the indenture governing the 2042 Debentures.
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed	38.00%
Debt Instrument, Repurchase Amount	$ 151,000,000
Debt Instrument Redemption Principal Amount	25
Debt Instrument Redemption Price	25.20
Repayments of Accounts Receivable Securitization	185,000,000
Other Notes Payable	900,000,000	$ 500,000,000
Collateralized Financings	$ 850,000,000

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The value of the collateral (typically cash) that the entity receives in a financing transaction in exchange for securities lent. This item represents a liability in the financial statements of the lender of the securities.

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