Capitalized Software Development Costs (Details) (Indemnity, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Indemnity
Total capitalized software development costs subject to amortization and the related amortization expense
Gross carrying amount	$ 58	$ 54	$ 43
Accumulated amortization	(18)	(11)	(5)
Net carrying amount	40	43	38
Amortization expense	7	6	4
Estimated future amortization expense related to capitalized software development costs
2014	7
2015	8
2016	8
2017	8
2018	$ 4