Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities:
Net earnings	$ 1,305	$ 1,279
Adjustments to reconcile net earnings to net cash provided by operating activities:
Change in receivables and advance premiums	8	53
Increase in deferred policy acquisition costs	(116)	(103)
Increase in policy liabilities	1,326	1,654
Change in income tax liabilities	368	(136)
Realized investment (gains) losses	196	194
Other, net	78	(87)
Net cash provided (used) by operating activities	3,165	2,854
Securities available for sale:
Fixed maturities sold	2,114	675
Fixed maturities matured or called	451	612
Perpetual securities matured or called	9	234
Equity securities sold	157	50
Securities held to maturity:
Fixed maturities matured or called	1,311	736
Costs of investments acquired:
Available for sale fixed maturities acquired	(5,662)	(3,827)
Available for sale equity securities acquired	(178)	(691)
Other investments, net	(514)	(324)
Settlement of derivatives, net	(34)	664
Cash received (pledged or returned) as collateral, net	(129)	(525)
Other, net	(42)	(33)
Net cash provided (used) by investing activities	(2,517)	(2,429)
Cash flows from financing activities:
Purchases of treasury stock	(813)	(1,014)
Proceeds from borrowings	524	0
Principal payments under debt obligations	(656)	(1)
Dividends paid to shareholders	(328)	(330)
Change in investment-type contracts, net	23	82
Treasury stock reissued	17	19
Other, net	2	(37)
Net cash provided (used) by financing activities	(1,231)	(1,281)
Effect of exchange rate changes on cash and cash equivalents	(12)	206
Net change in cash and cash equivalents	(595)	(650)
Cash and cash equivalents, beginning of period	4,859	4,350
Cash and cash equivalents, end of period	4,264	3,700
Supplemental disclosures of cash flow information:
Income taxes paid	293	944
Interest paid	103	101
Noncash interest	19	30
Impairment losses included in realized investment losses	19	47
Capital lease obligations incurred	3	2
Associate stock bonus
Treasury stock issued for:
Treasury stock issued	16	17
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued	16	12
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued	$ 1	$ 5