Finance Receivables (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			3 Months Ended	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Mar. 31, 2014 Consumer Finance Receivables North America Segment [Member]	Dec. 31, 2013 Consumer Finance Receivables North America Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Reclassifications from Nonaccretable Difference				$ 33	$ 48
Financing Receivable, Recorded Investment, Nonaccrual Status	545		642
Troubled Debt Restructurings - Subsequent Default	$ 14	$ 5