Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities
Net income		$ 1,645	$ 1,735
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment gains	[1]	(20)	(17)
Depreciation and amortization		429	442
Deferred federal income tax expense		142	131
Amortization of deferred acquisition costs		1,926	1,915
Equity in income from other investments		(134)	(257)
Premiums receivable		(486)	(463)
Reinsurance recoverables		263	206
Deferred acquisition costs		(1,991)	(1,989)
Claims and claim adjustment expense reserves		(826)	(60)
Unearned premium reserves		362	235
Other operating activities		(435)	(550)
Net cash provided by operating activities		875	1,328
Cash flows from investing activities
Proceeds from maturities of fixed maturities		5,314	4,915
Proceeds from sales of investments:
Fixed maturities		1,226	785
Equity securities		28	95
Real estate investments		10	5
Other investments		354	338
Purchases of investments:
Fixed maturities		(6,239)	(5,449)
Equity securities		(22)	(40)
Real estate investments		(69)	(36)
Other investments		(275)	(226)
Net sales of short-term securities		433	60
Securities transactions in course of settlement		183	204
Acquisition, net of cash acquired			(12)
Other investing activities		(178)	(152)
Net cash provided by investing activities		765	487
Cash flows from financing activities
Treasury stock acquired - share repurchase authorization		(1,400)	(1,525)
Treasury stock acquired - net employee share-based compensation		(72)	(55)
Dividends paid to shareholders		(369)	(365)
Issuance of common stock - employee share options		117	122
Excess tax benefits from share-based payment arrangements		31	24
Net cash used in financing activities		(1,693)	(1,799)
Effect of exchange rate changes on cash		(4)	1
Net increase (decrease) in cash		(57)	17
Cash at beginning of year		374	294
Cash at end of period		317	311
Supplemental disclosure of cash flow information
Income taxes paid		597	727
Interest paid		$ 183	$ 183

[1] Total other-than-temporary impairment (OTTI) losses were $(8) million and $(1) million for the three months ended June 30, 2015 and 2014, respectively, and $(12) million and $(8) million for the six months ended June 30, 2015 and 2014, respectively. Of total OTTI, credit losses of $(6) million and $(1) million for the three months ended June 30, 2015 and 2014, respectively, and $(9) million and $(10) million for the six months ended June 30, 2015 and 2014, respectively, were recognized in net realized investment gains. In addition, unrealized gains (losses) from other changes in total OTTI of $(2) million and $0 million for the three months ended June 30, 2015 and 2014, respectively, and $(3) million and $2 million for the six months ended June 30, 2015 and 2014, respectively, were recognized in other comprehensive income (loss) as part of changes in net unrealized gains on investment securities having credit losses recognized in the consolidated statement of income.