Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net earnings	$ 2,021	$ 1,908
Adjustments to reconcile net earnings to net cash provided by operating activities:
Change in receivables and advance premiums	(32)	41
Increase in deferred policy acquisition costs	(229)	(186)
Increase in policy liabilities	2,137	2,329
Change in income tax liabilities	323	(365)
Realized investment (gains) losses	166	358
Other, net	210	35
Net cash provided (used) by operating activities	4,596	4,120
Securities available for sale:
Fixed maturities sold	2,633	978
Fixed maturities matured or called	740	774
Perpetual securities matured or called	9	234
Equity securities sold	755	173
Securities held to maturity:
Fixed maturities matured or called	1,714	946
Costs of investments acquired:
Available for sale fixed maturities acquired	(6,827)	(4,871)
Available for sale equity securities acquired	(391)	(868)
Other investments, net	(949)	(801)
Settlement of derivatives, net	(240)	1,203
Cash received (pledged or returned) as collateral, net	(273)	(350)
Other, net	(58)	(56)
Net cash provided (used) by investing activities	(2,887)	(2,638)
Cash flows from financing activities:
Purchases of treasury stock	(1,053)	(1,222)
Proceeds from borrowings	524	988
Principal payments under debt obligations	(660)	(232)
Dividends paid to shareholders	(491)	(492)
Change in investment-type contracts, net	39	117
Treasury stock reissued	23	37
Other, net	5	(31)
Net cash provided (used) by financing activities	(1,613)	(835)
Effect of exchange rate changes on cash and cash equivalents	(28)	273
Net change in cash and cash equivalents	68	920
Cash and cash equivalents, beginning of period	4,859	4,350
Cash and cash equivalents, end of period	4,927	5,270
Supplemental disclosures of cash flow information:
Income taxes paid	693	1,594
Interest paid	144	155
Noncash interest	38	41
Impairment losses included in realized investment losses	27	71
Capital lease obligations incurred	7	2
Associate stock bonus
Treasury stock issued for:
Treasury stock issued	22	24
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued	22	19
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued	$ 1	$ 4