Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Cash flows from operating activities:
Net earnings	$ 1,569	$ 1,188	$ 1,781	$ 1,047	$ 4,391	$ 4,222
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities
Change in receivables and advance premiums					42	10
Capitalization of deferred policy acquisition costs					(804)	(770)
Amortization of deferred policy acquisition costs	201		194		608	598	$ 792
Increase in policy liabilities					(99)	717
Change in income tax liabilities					(289)	(491)
Net investment (gains) losses	(423)		(199)		(1,101)	(885)
Other, net					(391)	(555)
Net cash provided (used) by operating activities					2,357	2,846
Proceeds from investments sold or matured:
Available-for-sale fixed maturity securities					2,112	2,997
Equity securities					353	518
Held-to-maturity fixed maturity securities					2	2
Commercial mortgage and other loans					1,276	1,849
Costs of investments acquired:
Available-for-sale fixed maturity securities					(2,359)	(2,961)
Equity securities					(299)	(414)
Commercial mortgage and other loans					(744)	(3,552)
Other investments, net					(902)	(54)
Settlement of derivatives, net					56	(159)
Cash received (pledged or returned) as collateral, net					2,894	769
Other, net					(160)	158
Net cash provided (used) by investing activities					2,229	(847)
Cash flows from financing activities:
Purchases of treasury stock					(2,100)	(1,801)
Proceeds from borrowings					0	1,277
Principal payments under debt obligations					0	(966)
Dividends paid to shareholders					(730)	(740)
Change in investment-type contracts, net					(114)	(61)
Treasury stock reissued					9	15
Other, net					(1)	20
Net cash provided (used) by financing activities					(2,936)	(2,256)
Effect of exchange rate changes on cash and cash equivalents					(91)	(84)
Net change in cash and cash equivalents					1,559	(341)
Cash and cash equivalents, beginning of period		$ 3,943		$ 5,051	3,943	5,051	5,051
Cash and cash equivalents, end of period	$ 5,502		$ 4,710		5,502	4,710	$ 3,943
Supplemental disclosures of cash flow information:
Income taxes paid					870	600
Interest paid					132	153
Noncash interest					16	17
Noncash real estate acquired in satisfaction of debt					90	0
Noncash financing activities:
Lease obligations					50	72
Associate stock bonus
Treasury stock issued for:
Treasury stock issued					13	11
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued					28	28
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued					$ 5	$ 6