Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Short Term Investments	$ 2,528	$ 1,893
Fixed Maturities (cost $35,398 and $34,762)	38,076	37,184
Equity Securities (cost $1,244 and $1,264)	1,663	1,512
Other Invested Assets	1,954	2,180
TOTAL INVESTED ASSETS	44,221	42,769
Cash	50	58
Accrued Investment Income	424	440
Premiums Receivable	2,185	2,161
Reinsurance Recoverable on Unpaid Losses and Loss Expenses	1,941	1,739
Prepaid Reinsurance Premiums	337	320
Deferred Policy Acquisition Costs	1,206	1,210	[1]
Goodwill	467	467
Other Assets	1,353	1,281
TOTAL ASSETS	52,184	50,445	[1]
Liabilities
Unpaid Losses and Loss Expenses	23,963	23,068
Unearned Premiums	6,361	6,322
Long Term Debt	3,575	3,575
Dividend Payable to Shareholders	108	107
Deferred Income Tax	162	2	[1]
Accrued Expenses and Other Liabilities	2,188	2,070
TOTAL LIABILITIES	36,357	35,144	[1]
Commitments and Contingent Liabilities (Note 6 and 13)
Shareholders' Equity
Preferred Stock - Authorized 8,000,000 Shares; $1 Par Value; Issued - None
Common Stock - Authorized 1,200,000,000 Shares; $1 Par Value; Issued 371,980,460 Shares	372	372
Paid-In Surplus	178	190
Retained Earnings	20,009	18,903	[1]
Accumulated Other Comprehensive Income	1,431	1,195
Treasury Stock, at Cost - 110,217,445 and 99,519,509 Shares	(6,163)	(5,359)
TOTAL SHAREHOLDERS' EQUITY	15,827	15,301	[1]
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 52,184	$ 50,445	[1]

[1] As Adjusted