Consolidated Statement of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Cash flows from operating activities
Net income	$ 833		$ 1,052
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment gains	(10)	[1]	(1)	[1]
Depreciation and amortization	225		227
Deferred federal income tax expense	133		153
Amortization of deferred acquisition costs	963		950
Equity in income from other investments	(43)		(139)
Premiums receivable	(258)		(189)
Reinsurance recoverables	69		106
Deferred acquisition costs	(987)		(986)
Claims and claim adjustment expense reserves	(561)		(209)
Unearned premium reserves	185		94
Other operating activities	(350)		(355)
Net cash provided by operating activities	199		703
Cash flows from investing activities
Proceeds from maturities of fixed maturities	2,830		2,312
Proceeds from sales of investments:
Fixed maturities	906		406
Equity securities	11		36
Real estate investments	7		1
Other investments	146		167
Purchases of investments:
Fixed maturities	(3,325)		(2,715)
Equity securities	(8)		(18)
Real estate investments	(6)		(9)
Other investments	(168)		(113)
Net purchases of short-term securities	(134)		(160)
Securities transactions in course of settlement	305		240
Acquisition, net of cash acquired			(12)
Other investing activities	(90)		(60)
Net cash provided by investing activities	474		75
Cash flows from financing activities
Treasury stock acquired - share repurchase authorization	(600)		(650)
Treasury stock acquired - net employee share-based compensation	(71)		(54)
Dividends paid to shareholders	(177)		(176)
Issuance of common stock - employee share options	90		57
Excess tax benefits from share-based payment arrangements	27		13
Net cash used in financing activities	(731)		(810)
Effect of exchange rate changes on cash	(8)		(2)
Net decrease in cash	(66)		(34)
Cash at beginning of year	374		294
Cash at end of period	308		260
Supplemental disclosure of cash flow information
Income taxes paid	126		93
Interest paid	$ 34		$ 34

[1] Total other-than-temporary impairment (OTTI) losses were $(4) million and $(7) million for the three months ended March 31, 2015 and 2014, respectively. Of total OTTI, credit losses of $(3) million and $(9) million for the three months ended March 31, 2015 and 2014, respectively, were recognized in net realized investment gains. In addition, unrealized gains (losses) from other changes in total OTTI of $(1) million and $2 million for the three months ended March 31, 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.