Indemnity Supplemental Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Income attributable to Indemnity shareholder interest
Service agreement revenue	$ 8	$ 8
Total revenues	1,605	1,511
Net investment income	113	109
Net realized gains on investments	56	56
Net impairment losses recognized in earnings	(2)	0
Equity in earnings of limited partnerships	28	50
Income (loss) from operations before income taxes and noncontrolling interest	197	156
Provision for income taxes	61	47
Net income attributable to Indemnity	39	46
Indemnity
Income attributable to Indemnity shareholder interest
Net investment income	4	4
Net realized gains on investments	0	1
Equity in earnings of limited partnerships	2	6
Income (loss) from operations before income taxes and noncontrolling interest	59	69
Provision for income taxes	20	23
Net income attributable to Indemnity	39	46
Indemnity | Management operations
Income attributable to Indemnity shareholder interest
Management fee revenue, net	343	319
Service agreement revenue	8	7
Total revenues	351	326
Cost of management operations	298	268
Income (loss) from operations before income taxes and noncontrolling interest	53	58
Indemnity | Investment operations
Income attributable to Indemnity shareholder interest
Net investment income	4	4
Net realized gains on investments	0	1
Net impairment losses recognized in earnings	0	0
Equity in earnings of limited partnerships	2	6
Income (loss) from operations before income taxes and noncontrolling interest	$ 6	$ 11