Servicing Activities (Narrative - Automobile Servicing Activities) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Servicing Activities [Abstract]
Automobile Servicing Fees	$ 6	$ 13	$ 22	$ 48