Indemnity Supplemental Information (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income attributable to Indemnity shareholder interest
Service agreement revenue									$ 32	$ 32	$ 32
Total revenues	1,589	1,426	1,598	1,511	1,697	1,577	1,426	1,571	6,124	6,271	5,512
Net investment income									446	422	438
Net realized gains on investments (losses)									193	771	418
Net impairment losses recognized in earnings									(4)	(13)	0
Equity in earnings of limited partnerships									113	161	131
Income (loss) from operations before income taxes and noncontrolling interest	377	150	147	156	470	398	263	436	830	1,567	899
Provision for income taxes									257	519	280
Net income (loss) attributable to Indemnity	26	47	49	46	36	46	44	37	168	163	160
Indemnity
Income attributable to Indemnity shareholder interest
Net investment income									16	15	16
Net realized gains on investments (losses)									1	1	5
Net impairment losses recognized in earnings									0	0	0
Equity in earnings of limited partnerships									11	22	15
Income (loss) from operations before income taxes and noncontrolling interest									251	247	241
Provision for income taxes									83	84	81
Net income (loss) attributable to Indemnity									168	163	160
Cash settlements for payments on the account of the Exchange									378	351	343
Cash settlements for payments on the account of EFL									37	32	30
Number of field office facilities leased from the Exchange (in number of facilities)									3
Rent expense on office space leased from Exchange									8	6	6
Annual rentals paid to EFL									0.4	0.4	0.4
Indemnity | Management operations
Income attributable to Indemnity shareholder interest
Management fee revenue, net									1,376	1,266	1,157
Service agreement revenue									31	31	31
Total revenues									1,407	1,297	1,188
Cost of management operations									1,184	1,088	983
Income (loss) from operations before income taxes and noncontrolling interest									223	209	205
Indemnity | Investment operations
Income attributable to Indemnity shareholder interest
Net investment income									16	15	16
Net realized gains on investments (losses)									1	1	5
Net impairment losses recognized in earnings									0	0	0
Equity in earnings of limited partnerships									11	22	15
Income (loss) from operations before income taxes and noncontrolling interest									$ 28	$ 38	$ 36