Indemnity Accumulated Other Comprehensive Income (Loss) (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 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 gains	$ 133	$ 61	$ 189	$ 310
Net impairment losses recognized in earnings	0	(1)	0	(1)
Income (loss) from operations before income taxes and noncontrolling interest	147	263	303	699
Provision for income taxes	44	86	91	232
Net income (loss)	103	177	212	467	1,048
Less: Net income attributable to noncontrolling interest in consolidated entity – Exchange	54	133	117	386
Net income attributable to Indemnity	49	44	95	81
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 gains	5		18
Net impairment losses recognized in earnings	0		0
Income (loss) from operations before income taxes and noncontrolling interest	5		18
Provision for income taxes	2		7
Net income (loss)	3		11
Less: Net income attributable to noncontrolling interest in consolidated entity – Exchange	3		10
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