Finance Receivables Activity in post-acquisition consumer finance receivables portfolio (Details) (Consumer Finance Receivables, USD $) In Millions, unless otherwise specified							3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 International Segment [Member]	Dec. 31, 2013 International Segment [Member]	Mar. 31, 2014 North America Segment [Member]	Dec. 31, 2013 North America Segment [Member]	Mar. 31, 2014 Post-Acquisition Portfolio	Mar. 31, 2014 Post-Acquisition Portfolio International Segment [Member]	Mar. 31, 2014 Post-Acquisition Portfolio North America Segment [Member]	Mar. 31, 2013 Post-Acquisition Portfolio North America Segment [Member]
Accounts Notes And Loans Receivable Rollforward [Roll Forward]
Financing Receivable, Gross	$ 24,024	$ 23,130	$ 12,468	$ 11,742	$ 11,556	$ 11,388	$ 21,956	$ 11,394	$ 10,562	$ 8,831
Payments to Acquire Loans Receivable							3,412	2,048	1,364	1,359
Financing Receivable, Allowance for Credit Losses, Write-downs							(224)	(32)	(192)	(132)
Proceeds from Collection of Finance Receivables							(2,234)	(1,412)	(822)	(625)
Foreign Currency Translation - Finance Receivables							184	185	(1)	0
Financing Receivable, Gross	$ 24,024	$ 23,130	$ 12,468	$ 11,742	$ 11,556	$ 11,388	$ 23,094	$ 12,183	$ 10,911	$ 9,433