Finance Receivables Commercial Finance Receivables (Details) (Commercial Finance Receivables, USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accounts Notes And Loans Receivable Rollforward [Roll Forward]
Financing Receivable, Gross			$ 6,700	$ 560
Business Combination, Acquired Receivables, Fair Value	0	3,990	0	3,990
Proceeds from Collection of Finance Receivables			695	568
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0	0	0
Foreign Currency Translation - Finance Receivables			(244)	128
Financing Receivable, Gross	7,151	5,246	7,151	5,246
North America Segment [Member]
Accounts Notes And Loans Receivable Rollforward [Roll Forward]
Financing Receivable, Gross			1,975	560
Business Combination, Acquired Receivables, Fair Value	0	0	0	0
Proceeds from Collection of Finance Receivables			551	797
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0	0	0
Foreign Currency Translation - Finance Receivables			(13)	0
Financing Receivable, Gross	2,513	1,357	2,513	1,357
International Segment [Member]
Accounts Notes And Loans Receivable Rollforward [Roll Forward]
Financing Receivable, Gross			4,725	0
Business Combination, Acquired Receivables, Fair Value	0	3,990	0	3,990
Proceeds from Collection of Finance Receivables			144	(229)
Financing Receivable, Allowance for Credit Losses, Write-downs	0	0	0	0
Foreign Currency Translation - Finance Receivables			(231)	128
Financing Receivable, Gross	$ 4,638	$ 3,889	$ 4,638	$ 3,889