Indemnity Accumulated Other Comprehensive Income (Loss) (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
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 (losses) gains	$ (85)	$ 191	$ 104	$ 501
Net impairment losses recognized in earnings	(1)	(9)	(1)	(10)
Income (loss) from operations before income taxes and noncontrolling interest	150	398	453	1,097
Provision for income taxes	42	131	133	363
Net income (loss)	108	267	320	734	1,048
Less: Net income attributable to noncontrolling interest in consolidated entity – Exchange	61	221	178	607
Net income attributable to Indemnity	47	46	142	127
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 income attributable to Indemnity	0		1
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 (losses) gains	6		24
Net impairment losses recognized in earnings	(1)		(1)
Income (loss) from operations before income taxes and noncontrolling interest	5		23
Provision for income taxes	1		8
Net income (loss)	4		15
Less: Net income attributable to noncontrolling interest in consolidated entity – Exchange	4		14
Net income attributable to Indemnity	0		1
Amortization of postretirement plan items | 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 income attributable to Indemnity	$ 0		$ 0