Indemnity Supplemental Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income attributable to Indemnity shareholder interest
Service agreement revenue	$ 8	$ 8	$ 16	$ 16
Total revenues	1,598	1,426	3,109	2,997
Net investment income	111	104	220	207
Net realized gains on investments	133	61	189	310
Net impairment losses recognized in earnings	0	(1)	0	(1)
Equity in earnings of limited partnerships	27	39	77	75
Income (loss) from operations before income taxes and noncontrolling interest	147	263	303	699
Provision for income taxes	44	86	91	232
Net income attributable to Indemnity	49	44	95	81
Indemnity
Income attributable to Indemnity shareholder interest
Net investment income	4	3	8	7
Net realized gains on investments	0	0	1	0
Equity in earnings of limited partnerships	3	5	9	8
Income (loss) from operations before income taxes and noncontrolling interest	75	67	144	123
Provision for income taxes	26	23	49	42
Net income attributable to Indemnity	49	44	95	81
Indemnity | Management operations
Income attributable to Indemnity shareholder interest
Management fee revenue, net	366	336	685	632
Service agreement revenue	8	8	15	15
Total revenues	374	344	700	647
Cost of management operations	306	285	574	539
Income (loss) from operations before income taxes and noncontrolling interest	68	59	126	108
Indemnity | Investment operations
Income attributable to Indemnity shareholder interest
Net investment income	4	3	8	7
Net realized gains on investments	0	0	1	0
Net impairment losses recognized in earnings	0	0	0	0
Equity in earnings of limited partnerships	3	5	9	8
Income (loss) from operations before income taxes and noncontrolling interest	$ 7	$ 8	$ 18	$ 15