Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011		Sep. 30, 2012	Sep. 30, 2011
Revenues
Premiums Earned	$ 2,977	$ 2,932		$ 8,911	$ 8,699
Investment income	383	415		1,174	1,235
Other Revenues	2	2		7	6
Realized Investment Gains (Losses), Net
Total Other-Than-Temporary Impairment Losses on Investments	(5)	(6)		(40)	(22)
Other-Than-Temporary Impairment Losses on Investments Recognized in Other Comprehensive Income	(2)	(1)		(4)	(1)
Other Realized Investment Gains, Net	7	78		147	323
Total Realized Investment Gains, Net		71		103	300
Total Revenues	3,362	3,420		10,195	10,240
Losses and Expenses
Losses and Loss Expenses	1,597	2,054		5,164	5,666
Amortization of Deferred Policy Acquisition Costs	620	602	[1]	1,803	1,725	[1]
Other Insurance Operating Costs and Expenses	341	315	[1]	1,058	994	[1]
Investment Expenses	9	8		30	31
Other Expenses	3	2		9	7
Corporate Expenses	65	73		198	220
Total Losses and Expenses	2,635	3,054		8,262	8,643
Income Before Federal and Foreign Income Tax	727	366		1,933	1,597
Federal and Foreign Income Tax	194	68		490	371
Net Income	$ 533	$ 298		$ 1,443	$ 1,226
Net Income Per Share
Basic	$ 1.99	$ 1.04		$ 5.32	$ 4.19
Diluted	$ 1.98	$ 1.04		$ 5.29	$ 4.16
Dividends Declared Per Share	$ 0.41	$ 0.39		$ 1.23	$ 1.17

[1] As Adjusted