Finance Receivables Finance Receivables Summary (Details) (Consumer Loan [Member], Pre-Acquisition Portfolio, USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2012
Accounts Notes And Loans Receivable Rollforward [Roll Forward]
Financing Receivable, Gross			$ 1,294	$ 2,162
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	1,174	1,958
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value		601
Proceeds from Collection of Finance Receivables	(589)	(1,077)
Change in Carrying Value Adjustment	29	(37)
Foreign Currency Translation - Finance Receivables	(16)	7
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	598	1,452
North America Segment [Member]
Accounts Notes And Loans Receivable Rollforward [Roll Forward]
Financing Receivable, Gross			931	2,162
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	826	1,958
Proceeds from Collection of Finance Receivables	(418)	(885)
Change in Carrying Value Adjustment	(7)	(45)
Foreign Currency Translation - Finance Receivables	0	0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	401	1,028
International Segment [Member]
Accounts Notes And Loans Receivable Rollforward [Roll Forward]
Financing Receivable, Gross			363	0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	348	0
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Acquired During Period, at Acquisition, at Fair Value		601
Proceeds from Collection of Finance Receivables	(171)	(192)
Change in Carrying Value Adjustment	36	8
Foreign Currency Translation - Finance Receivables	(16)	7
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Carrying Amount, Net	$ 197	$ 424