Indemnity Supplemental Information (Details 3) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Condensed financial statements
Service agreement fee received	$ 25	$ 26
Premiums collected	3,213	3,068
Net investment income received	340	325
Limited partnership distributions	93	88
Commissions and bonuses paid to agents	(450)	(414)
Losses paid	(2,221)	(1,808)
Loss expenses paid	(331)	(321)
Other underwriting and acquisition costs paid	(406)	(394)
Income taxes paid	(38)	(105)
Net cash provided by operating activities	225	465
Net cash used in investing activities	(395)	(301)
Net cash used in financing activities	(184)	(86)
Net decrease in cash and cash equivalents	(354)	78
Cash and cash equivalents at beginning of period	430	234
Cash and cash equivalents at end of period	76	312
Indemnity
Condensed financial statements
Management fee received	791	713
Service agreement fee received	25	26
Premiums collected		166
Net investment income received	17	33
Limited partnership distributions	14	14
Decrease in reimbursements collected from affiliates	(13)	(5)
Commissions and bonuses paid to agents	(450)	(414)
Salaries and wages paid	(95)	(80)
Pension contribution and employee benefits paid	(32)	(29)
Losses paid		(99)
Loss expenses paid		(17)
Other underwriting and acquisition costs paid		(42)
General operating expenses paid	(93)	(87)
Income taxes paid	(51)	(50)
Net cash provided by operating activities	113	129
Net cash used in investing activities	(180)	(14)
Net cash used in financing activities	(209)	(118)
Net decrease in cash and cash equivalents	(276)	(3)
Cash and cash equivalents at beginning of period	310	76
Cash and cash equivalents at end of period	$ 34	$ 73