CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Income		$ 724	$ 909	$ 521
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments		(88)	184	(102)
Net unrealized investment gains (losses)	[1]	(858)	1,829	(9,276)
Effect of updating discount rates on future policy benefits		2,156	(499)	7,964
Change in instrument-specific credit risk for market risk benefits		(1)	(10)	20
Defined benefit pension and postretirement plan adjustments		9	(2)	23
Total other comprehensive income (loss), net of tax		1,218	1,502	(1,371)
Total comprehensive income (loss)		1,942	2,411	(850)
Comprehensive income attributable to noncontrolling interest		7	7	4
Total comprehensive income (loss) available to Reinsurance Group of America, Inc.		$ 1,935	$ 2,404	$ (854)

[1] Includes cash flow hedges. See Note 12 for additional information on cash flow hedges.