CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Revenues
Premiums earned	$ 1,109	$ 1,047	$ 2,196	$ 2,077
Net investment income	113	113	221	218
Net realized investment (losses) gains	(107)	39	189	188
Net impairment losses recognized in earnings	0	0	0	0
Equity in earnings of limited partnerships	37	38	58	110
Other income	8	8	16	17
Total revenues	1,160	1,245	2,680	2,610
Benefits and expenses
Insurance losses and loss expenses	943	1,170	1,659	1,876
Policy acquisition and underwriting expenses	287	249	557	496
Total benefits and expenses	1,230	1,419	2,216	2,372
(Loss) income from operations before income taxes and noncontrolling interest	(70)	(174)	464	238
Provision for income taxes	(32)	(67)	148	71
Net (loss) income	(38)	(107)	316	167	268
Less: Net (loss) income attributable to noncontrolling interest in consolidated entity - Exchange	(81)	(159)	237	71
Net income attributable to Indemnity	43	52	79	96
Indemnity
Revenues
Net investment income	4	4	8	8
Net realized investment (losses) gains	(1)	6	2	7
Benefits and expenses
(Loss) income from operations before income taxes and noncontrolling interest	65	81	119	148
Provision for income taxes	22	29	40	52
Net (loss) income			79		169
Net income attributable to Indemnity	$ 43	$ 52	$ 79	$ 96
Class A | Indemnity
Net income attributable to Indemnity per share
Common stock - basic (in dollars per share)	$ 0.90	$ 1.05	$ 1.65	$ 1.93
Common stock - diluted (in dollars per share)	$ 0.80	$ 0.94	$ 1.47	$ 1.72
Weighted average shares outstanding attributable to Indemnity - Basic
Common stock - basic (in shares)	47,492,305	49,250,061	47,619,852	49,518,069
Weighted average shares outstanding attributable to Indemnity- Diluted
Common stock - diluted (in shares)	53,677,848	55,436,976	53,807,795	55,704,984
Dividends declared per share
Common stock (in dollars per share)	$ 0.5525	$ 0.515	$ 1.105	$ 1.03	$ 2.0975
Class B | Indemnity
Net income attributable to Indemnity per share
Common stock - basic (in dollars per share)	$ 134.78	$ 158.33	$ 248.55	$ 291.07
Common stock - diluted (in dollars per share)	$ 134.78	$ 158.33	$ 248.55	$ 291.07
Weighted average shares outstanding attributable to Indemnity - Basic
Common stock - basic (in shares)	2,544	2,546	2,545	2,546
Weighted average shares outstanding attributable to Indemnity- Diluted
Common stock - diluted (in shares)	2,544	2,546	2,545	2,546
Dividends declared per share
Common stock (in dollars per share)	$ 82.8750	$ 77.250	$ 165.7500	$ 154.5000	$ 314.6250