Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Cash flows from operating activities:
Net earnings	$ 599	$ 29	$ 1,755	$ 1,879	$ 628	$ 3,634
Adjustments to reconcile net earnings to net cash provided (used) by operating activities:
Change in receivables and advance premiums					(48)	19
Capitalization of deferred policy acquisition costs					(503)	(508)
Amortization of deferred policy acquisition costs	221		208		437	424	$ 851
Increase in policy liabilities					(195)	(43)
Change in income tax liabilities					(267)	(221)
Net investment (gains) losses	421		(696)		1,384	(1,647)
Other, net					(448)	(554)
Net cash provided (used) by operating activities					988	1,104
Proceeds from investments sold or matured:
Available-for-sale fixed maturity securities					7,816	3,598
Equity securities					240	550
Held-to-maturity fixed maturity securities					2	1
Commercial mortgage and other loans					1,075	952
Costs of investments acquired:
Available-for-sale fixed maturity securities					(9,412)	(3,357)
Equity securities					(249)	(179)
Commercial mortgage and other loans					(799)	(512)
Other investments, net					(1,012)	(2,284)
Settlement of derivatives, net					26	(106)
Cash received (pledged or returned) as collateral, net					3,523	3,375
Other, net					(36)	256
Net cash provided (used) by investing activities					1,174	2,294
Cash flows from financing activities:
Purchases of treasury stock					(1,729)	(1,550)
Proceeds from borrowings					1,039	823
Principal payments under debt obligations					0	(194)
Dividends paid to shareholders					(607)	(550)
Change in investment-type contracts, net					(123)	(103)
Treasury stock reissued					2	12
Other, net					(5)	(14)
Net cash provided (used) by financing activities					(1,423)	(1,576)
Effect of exchange rate changes on cash and cash equivalents					(3)	(68)
Net change in cash and cash equivalents					736	1,754
Cash and cash equivalents, beginning of period		$ 6,229		$ 4,306	6,229	4,306	4,306
Cash and cash equivalents, end of period	$ 6,965		$ 6,060		6,965	6,060	$ 6,229
Supplemental disclosures of cash flow information:
Income taxes paid					605	777
Interest paid					92	87
Noncash interest					10	11
Noncash real estate acquired in satisfaction of debt					247	294
Noncash financing activities:
Lease obligations					19	20
Associate stock bonus
Treasury stock issued for:
Treasury stock issued					12	10
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued					22	21
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued					$ 7	$ 6