Indemnity Accumulated Other Comprehensive Income (Loss) (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Amounts reclassified out of accumulated other comprehensive income (loss) and the related affected line item in the Consolidated Statements of Operations where net income is presented
Net realized investment gains	$ 56	$ 56
Net impairment losses recognized in earnings	(2)	0
Income (loss) from operations before income taxes and noncontrolling interest	197	156
Provision for income taxes	61	47
Net income (loss)	136	109	573
Less: Net income attributable to noncontrolling interest in consolidated entity – Exchange	97	63
Net income attributable to Indemnity	39	46
Unrealized holding gains (losses) on available-for-sale securities | Amounts reclassified from accumulated other comprehensive income (loss)
Amounts reclassified out of accumulated other comprehensive income (loss) and the related affected line item in the Consolidated Statements of Operations where net income is presented
Net realized investment gains	7	13
Net impairment losses recognized in earnings	(2)	0
Income (loss) from operations before income taxes and noncontrolling interest	5	13
Provision for income taxes	2	5
Net income (loss)	3	8
Less: Net income attributable to noncontrolling interest in consolidated entity – Exchange	3	7
Net income attributable to Indemnity	$ 0	$ 1