Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Cash flows from operating activities:
Net earnings	$ 928	$ 717
Adjustments to reconcile net earnings to net cash provided by operating activities:
Change in receivables and advance premiums	35	14
Capitalization of deferred policy acquisition costs	(357)	(349)
Amortization of deferred policy acquisition costs	340	314
Increase in policy liabilities	468	572
Change in income tax liabilities	316	(131)
Realized investment (gains) losses	(71)	134
Other, net	(115)	(33)
Net cash provided (used) by operating activities	1,544	1,238
Proceeds from investments sold or matured:
Available-for-sale fixed maturity securities	760	943
Equity securities	153	157
Held-to-maturity fixed maturity securities	155	50
Commercial mortgage and other loans	493	146
Costs of investments acquired:
Available for sale fixed maturity securities	(2,548)	(3,975)
Equity securities	(151)	(166)
Commercial mortgage and other loans	(669)	(1,772)
Other investments, net	(442)	(125)
Settlement of derivatives, net	(3)	(1)
Cash received (pledged or returned) as collateral, net	976	4,578
Other, net	(15)	(34)
Net cash provided (used) by investing activities	(1,291)	(199)
Cash flows from financing activities:
Purchases of treasury stock	(490)	(296)
Proceeds from borrowings	0	2
Dividends paid to shareholders	(195)	(195)
Change in investment-type contracts, net	(13)	7
Treasury stock reissued	12	14
Other, net	0	(5)
Net cash provided (used) by financing activities	(686)	(473)
Effect of exchange rate changes on cash and cash equivalents	(12)	23
Net change in cash and cash equivalents	(445)	589
Cash and cash equivalents, beginning of period	4,337	3,491
Cash and cash equivalents, end of period	3,892	4,080
Supplemental disclosures of cash flow information:
Income taxes paid	(2)	396
Interest paid	36	36
Noncash interest	22	21
Impairment losses included in realized investment losses	2	7
Noncash financing activities:
Lease obligations	1	1
Associate stock bonus
Treasury stock issued for:
Treasury stock issued	6	5
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued	8	8
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued	$ 4	$ 2