Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net earnings	$ 4,778	$ 3,304	$ 2,920
Adjustments to reconcile net earnings to net cash provided by operating activities:
Change in receivables and advance premiums	52	(32)	(55)
Capitalization of deferred policy acquisition costs	(1,142)	(1,452)	(1,504)
Amortization of deferred policy acquisition costs	1,214	1,282	1,245
Increase in policy liabilities	2,023	2,104	2,343
Change in income tax liabilities	(1,419)	(244)	64
Net investment (gains) losses	270	135	430
Other, net	182	358	571
Net cash provided (used) by operating activities	5,958	5,455	6,014
Proceeds from investments sold or matured:
Available-for-sale fixed maturity securities	3,725	5,284	7,888
Equity securities	234	650	429
Held-to-maturity fixed maturity securities	4	622	1,670
Commercial mortgage and other loans	2,085	1,814	936
Costs of investments acquired:
Available for sale fixed maturity securities	(4,772)	(6,934)	(9,086)
Equity securities	(498)	(347)	(440)
Commercial mortgage and other loans	(3,263)	(4,401)	(4,848)
Other investments, net	(860)	(653)	(414)
Settlement of derivatives, net	18	(9)	(241)
Cash received (pledged or returned) as collateral, net	(1,027)	926	348
Other, net	(265)	(123)	176
Net cash provided (used) by investing activities	(4,619)	(3,171)	(3,582)
Cash flows from financing activities:
Purchases of treasury stock	(1,537)	(1,627)	(1,301)
Proceeds from borrowings	1,545	615	1,020
Principal payments under debt obligations	(350)	0	(550)
Dividends paid to shareholders	(769)	(771)	(793)
Change in investment-type contracts, net	(11)	(1)	(31)
Treasury stock reissued	34	49	58
Other, net	(27)	22	(19)
Net cash provided (used) by financing activities	(1,115)	(1,713)	(1,616)
Effect of exchange rate changes on cash and cash equivalents	21	(12)	30
Net change in cash and cash equivalents	245	559	846
Cash and cash equivalents, beginning of period	4,896	4,337	3,491
Cash and cash equivalents, end of period	5,141	4,896	4,337
Supplemental disclosures of cash flow information:
Income taxes paid	800	1,384	998
Interest paid	210	190	181
Noncash interest	32	37	41
Noncash financing activities:
Lease obligations	56	132	11
Associate stock bonus
Treasury stock issued for:
Treasury stock issued	19	15	7
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued	29	30	8
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued	$ 6	$ 5	$ 2