Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net earnings	$ 3,304	$ 2,920	$ 4,604
Adjustments to reconcile net earnings to net cash provided by operating activities:
Change in receivables and advance premiums	(32)	(55)	(91)
Capitalization of deferred policy acquisition costs	(1,452)	(1,504)	(1,468)
Amortization of deferred policy acquisition costs	1,282	1,245	1,132
Increase in policy liabilities	2,104	2,343	2,890
Change in income tax liabilities	(244)	64	(1,240)
Realized investment (gains) losses	135	430	151
Other, net	358	571	150
Net cash provided (used) by operating activities	5,455	6,014	6,128
Proceeds from investments sold or matured:
Available-for-sale fixed maturity securities	5,284	7,888	4,680
Equity securities, FV-NI	650	429
Equity securities, available for sale			902
Held-to-maturity fixed maturity securities	622	1,670	2,212
Commercial mortgage and other loans	1,814	936	303
Costs of investments acquired:
Available for sale fixed maturity securities	(6,934)	(9,086)	(9,867)
Equity securities, FV-NI	(347)	(440)
Equity securities, available-for-sale			(446)
Commercial mortgage and other loans	(4,401)	(4,848)	(2,115)
Other investments, net	(653)	(414)	(206)
Settlement of derivatives, net	(9)	(241)	(621)
Cash received (pledged or returned) as collateral, net	926	348	(205)
Other, net	(123)	176	(68)
Net cash provided (used) by investing activities	(3,171)	(3,582)	(5,431)
Cash flows from financing activities:
Purchases of treasury stock	(1,627)	(1,301)	(1,351)
Proceeds from borrowings	615	1,020	1,040
Principal payments under debt obligations	0	(550)	(1,161)
Dividends paid to shareholders	(771)	(793)	(661)
Change in investment-type contracts, net	(1)	(31)	35
Treasury stock reissued	49	58	33
Other, net	22	(19)	0
Net cash provided (used) by financing activities	(1,713)	(1,616)	(2,065)
Effect of exchange rate changes on cash and cash equivalents	(12)	30	0
Net change in cash and cash equivalents	559	846	(1,368)
Cash and cash equivalents, beginning of period	4,337	3,491	4,859
Cash and cash equivalents, end of period	4,896	4,337	3,491
Supplemental disclosures of cash flow information:
Income taxes paid	1,384	998	780
Interest paid	190	181	196
Noncash interest	37	41	44
Impairment losses and loan loss reserves included in realized investment losses	31	81	37
Noncash financing activities:
Lease obligations	132	11	12
Associate stock bonus
Treasury stock issued for:
Treasury stock issued	15	7	29
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued	30	8	29
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued	$ 5	$ 2	$ 1