Indemnity Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Changes in Indemnity's accumulated other comprehensive income (loss) by component attributable to the Indemnity shareholder interest
Other comprehensive (loss) income	$ (144)	$ 150	$ (70)
Indemnity
Changes in Indemnity's accumulated other comprehensive income (loss) by component attributable to the Indemnity shareholder interest
Balance, beginning of year	(133)
Other comprehensive (loss) income before reclassifications, net of tax	65
Amounts reclassified from accumulated other comprehensive (loss) income, net of tax	9
Other comprehensive (loss) income	74
Balance, end of year	(59)
Indemnity | Unrealized holding gains (losses) on available-for-sale securities
Changes in Indemnity's accumulated other comprehensive income (loss) by component attributable to the Indemnity shareholder interest
Balance, beginning of year	13
Other comprehensive (loss) income before reclassifications, net of tax	(6)
Amounts reclassified from accumulated other comprehensive (loss) income, net of tax	(1)
Other comprehensive (loss) income	(7)
Balance, end of year	6
Indemnity | Postretirement Plans
Changes in Indemnity's accumulated other comprehensive income (loss) by component attributable to the Indemnity shareholder interest
Balance, beginning of year	(146)
Other comprehensive (loss) income before reclassifications, net of tax	71
Amounts reclassified from accumulated other comprehensive (loss) income, net of tax	10
Other comprehensive (loss) income	81
Balance, end of year	$ (65)