Equity Based Compensation (Disclosure of Share-based Compensation Shares Authorized under Stock Option Plans by Exercise Price Range) (Details)	12 Months Ended
	Dec. 31, 2025 $ / shares shares
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding \| shares	1,447,014
Options Outstanding, Weighted-Average Remaining Contractual Life	5 years
Options Outstanding, Weighted Average Exercise Price	$ 135.68
Options Exercisable \| shares	1,301,027
Options Exercisable, Weighted-Average Exercise Price	$ 130.56
$50.00 - $59.99 [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding \| shares	262,348
Options Outstanding, Weighted-Average Remaining Contractual Life	5 years
Options Outstanding, Weighted Average Exercise Price	$ 104.01
Options Exercisable \| shares	262,348
Options Exercisable, Weighted-Average Exercise Price	$ 104.01
Exercise Price Range, Lower Range Limit	90.00
Exercise Price Range, Upper Range Limit	$ 109.99
$60.00 - $69.99 [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding \| shares	591,028
Options Outstanding, Weighted-Average Remaining Contractual Life	4 years
Options Outstanding, Weighted Average Exercise Price	$ 122.70
Options Exercisable \| shares	591,028
Options Exercisable, Weighted-Average Exercise Price	$ 122.70
Exercise Price Range, Lower Range Limit	110.00
Exercise Price Range, Upper Range Limit	$ 129.99
$70.00 - $79.99 [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding \| shares	256,305
Options Outstanding, Weighted-Average Remaining Contractual Life	4 years 10 months 24 days
Options Outstanding, Weighted Average Exercise Price	$ 142.27
Options Exercisable \| shares	227,151
Options Exercisable, Weighted-Average Exercise Price	$ 142.77
Exercise Price Range, Lower Range Limit	130.00
Exercise Price Range, Upper Range Limit	$ 149.99
$90.00 plus [Member]
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Options Outstanding \| shares	337,333
Options Outstanding, Weighted-Average Remaining Contractual Life	6 years 7 months 6 days
Options Outstanding, Weighted Average Exercise Price	$ 178.08
Options Exercisable \| shares	220,500
Options Exercisable, Weighted-Average Exercise Price	$ 170.66
Exercise Price Range, Lower Range Limit	$ 150.00

REINSURANCE GROUP OF AMERICA INC 10-K