Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities
Net income		$ 2,573	$ 2,654
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized investment gains	[1]	(35)	(57)
Depreciation and amortization		620	653
Deferred federal income tax expense		105	93
Amortization of deferred acquisition costs		2,913	2,899
Equity in income from other investments		(214)	(412)
Premiums receivable		(300)	(334)
Reinsurance recoverables		247	403
Deferred acquisition costs		(2,998)	(2,993)
Claims and claim adjustment expense reserves		(874)	(298)
Unearned premium reserves		542	379
Other operating activities		95	181
Net cash provided by operating activities		2,674	3,168
Cash flows from investing activities
Proceeds from maturities of fixed maturities		8,805	7,975
Proceeds from sales of investments:
Fixed maturities		1,555	927
Equity securities		38	128
Real estate investments		15	5
Other investments		505	612
Purchases of investments:
Fixed maturities		(9,972)	(8,237)
Equity securities		(31)	(47)
Real estate investments		(116)	(41)
Other investments		(389)	(406)
Net purchases of short-term securities		(782)	(1,163)
Securities transactions in course of settlement		103	119
Acquisition, net of cash acquired			(12)
Other investing activities		(222)	(262)
Net cash used in investing activities		(491)	(402)
Cash flows from financing activities
Issuance of debt		392
Treasury stock acquired - share repurchase authorization		(2,150)	(2,275)
Treasury stock acquired - net employee share-based compensation		(73)	(56)
Dividends paid to shareholders		(557)	(549)
Issuance of common stock - employee share options		142	154
Excess tax benefits from share-based payment arrangements		42	38
Net cash used in financing activities		(2,204)	(2,688)
Effect of exchange rate changes on cash		(9)	(5)
Net increase (decrease) in cash		(30)	73
Cash at beginning of year		374	294
Cash at end of period		344	367
Supplemental disclosure of cash flow information
Income taxes paid		882	785
Interest paid		$ 217	$ 217

[1] Total other-than-temporary impairment (OTTI) losses were $(14) million and $(8) million for the three months ended September 30, 2015 and 2014, respectively, and $(26) million and $(16) million for the nine months ended September 30, 2015 and 2014, respectively. Of total OTTI, credit losses of $(14) million and $(10) million for the three months ended September 30, 2015 and 2014, respectively, and $(23) million and $(20) million for the nine months ended September 30, 2015 and 2014, respectively, were recognized in net realized investment gains. In addition, unrealized gains (losses) from other changes in total OTTI of $0 million and $2 million for the three months ended September 30, 2015 and 2014, respectively, and $(3) million and $4 million for the nine months ended September 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.