Indemnity Supplemental Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Condensed financial statements
Service agreement revenue	$ 8	$ 8	$ 16	$ 16
Total revenues	1,426	1,160	2,997	2,680
Net investment income	104	113	207	221
Net realized gains (losses) on investments	61	(107)	310	189
Net impairment losses recognized in earnings	(1.0)	0	(1.0)	0
Equity in earnings of limited partnerships	39	37	75	58
Income (loss) from operations before income taxes and noncontrolling interest	263	(70)	699	464
Net income attributable to Indemnity	44	43	81	79
Indemnity
Condensed financial statements
Net investment income	3	4	7	8
Net realized gains (losses) on investments	0	(1)	0	2
Net impairment losses recognized in earnings	(0.1)	0	(0.1)	0
Income (loss) from operations before income taxes and noncontrolling interest	67	65	123	119
Provision for income taxes	23	22	42	40
Net income attributable to Indemnity	44	43	81	79
Indemnity | Management operations
Condensed financial statements
Management fee revenue, net	336	308	632	577
Service agreement revenue	8	8	15	15
Total revenues	344	316	647	592
Cost of management operations	285	257	539	487
Income (loss) from operations before income taxes and noncontrolling interest	59	59	108	105
Indemnity | Investment operations
Condensed financial statements
Net investment income	3	4	7	8
Net realized gains (losses) on investments	0	(1)	0	2
Net impairment losses recognized in earnings	0	0	0	0
Equity in earnings of limited partnerships	5	3	8	4
Income (loss) from operations before income taxes and noncontrolling interest	$ 8	$ 6	$ 15	$ 14