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Equity (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Equity, Class of Treasury Stock [Line Items]
Document Period End Date			Sep. 30, 2021
Treasury Stock, Value, Acquired, Cost Method	$ 46	$ 0	$ 48	$ 162
Stock Repurchase Program, Authorized Amount	$ 400		400
Proceeds from issuance of common stock, net			$ 0	$ 481
RGA Share Repurchase Program [Member]
Equity, Class of Treasury Stock [Line Items]
Treasury Stock, Shares, Acquired			405,644	1,074,413
Treasury Stock, Value, Acquired, Cost Method			$ 46	$ 153

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For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

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The cash inflow from the additional capital contribution to the entity.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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