Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities:
Net earnings	$ 592	$ 731
Adjustments to reconcile net earnings to net cash provided by operating activities:
Change in receivables and advance premiums	106	32
Increase in deferred policy acquisition costs	(41)	(37)
Increase in policy liabilities	666	919
Change in income tax liabilities	271	(367)
Realized investment (gains) losses	140	(30)
Other, net	23	83
Net cash provided (used) by operating activities	1,757	1,331
Securities available for sale:
Fixed maturities sold	1,385	266
Fixed maturities matured or called	204	408
Perpetual securities matured or called	0	35
Equity securities sold	155	0
Securities held to maturity:
Fixed maturities matured or called	228	277
Costs of investments acquired:
Available for sale fixed maturities acquired	(3,726)	(1,911)
Available for sale equity securities acquired	(157)	(364)
Other investments, net	(203)	(123)
Settlement of derivatives, net	(44)	273
Cash received (pledged or returned) as collateral, net	654	(189)
Other, net	(23)	(159)
Net cash provided (used) by investing activities	(1,527)	(1,487)
Cash flows from financing activities:
Purchases of treasury stock	(610)	(612)
Proceeds from borrowings	524	0
Principal payments under debt obligations	(654)	0
Dividends paid to shareholders	(166)	(167)
Change in investment-type contracts, net	18	45
Treasury stock reissued	11	7
Other, net	1	(39)
Net cash provided (used) by financing activities	(876)	(766)
Effect of exchange rate changes on cash and cash equivalents	(8)	21
Net change in cash and cash equivalents	(654)	(901)
Cash and cash equivalents, beginning of period	4,859	4,350
Cash and cash equivalents, end of period	4,205	3,449
Supplemental disclosures of cash flow information:
Income taxes paid	58	779
Interest paid	47	54
Noncash interest	15	12
Impairment losses included in realized investment losses	10	14
Capital lease obligations incurred	2	1
Associate stock bonus
Treasury stock issued for:
Treasury stock issued	6	8
Shareholder dividend reinvestment
Treasury stock issued for:
Treasury stock issued	7	6
Share-based compensation grants
Treasury stock issued for:
Treasury stock issued	$ 1	$ 4