Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net earnings	$ 717	$ 592
Adjustments to reconcile net earnings to net cash provided by operating activities:
Change in receivables and advance premiums	14	106
Capitalization of deferred policy acquisition costs	(349)	(335)
Amortization of deferred policy acquisition costs	314	294
Increase in policy liabilities	572	666
Change in income tax liabilities	(131)	271
Realized investment (gains) losses	134	140
Other, net	(33)	23
Net cash provided (used) by operating activities	1,238	1,757
Securities available for sale:
Fixed maturity securities sold	433	1,385
Fixed maturity securities matured or called	510	204
Equity securities sold	157	155
Securities held to maturity:
Fixed maturity securities matured or called	50	228
Other investments - loan receivables proceeds	146	34
Costs of investments acquired:
Available for sale fixed maturity securities acquired	(3,975)	(3,726)
Equity securities acquired	(166)	(157)
Other investments, loan receivables acquired	(1,772)	(123)
Other investments, excluding loan receivables. net	(125)	(114)
Settlement of derivatives, net	(1)	(44)
Cash received (pledged or returned) as collateral, net	4,578	654
Other, net	(34)	(23)
Net cash provided (used) by investing activities	(199)	(1,527)
Cash flows from financing activities:
Purchases of treasury stock	(296)	(610)
Proceeds from borrowings	2	524
Principal payments under debt obligations	0	(654)
Dividends paid to shareholders	(195)	(166)
Change in investment-type contracts, net	7	18
Treasury stock reissued	14	11
Other, net	(5)	1
Net cash provided (used) by financing activities	(473)	(876)
Effect of exchange rate changes on cash and cash equivalents	23	(8)
Net change in cash and cash equivalents	589	(654)
Cash and cash equivalents, beginning of period	3,491	4,859
Cash and cash equivalents, end of period	4,080	4,205
Supplemental disclosures of cash flow information:
Income taxes paid	396	58
Interest paid	36	47
Noncash interest	21	15
Impairment losses included in realized investment losses	7	10
Noncash financing activities:
Capital lease obligations	1	2
Associate stock bonus
Treasury stock issued for:
Treasury stock issued	5	6
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued	8	7
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued	$ 2	$ 1