Finance Receivables Activity in post-acquisition consumer finance receivables portfolio (Details) (Consumer Finance Receivables, USD $) In Millions, unless otherwise specified							3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 International Segment [Member]	Dec. 31, 2013 International Segment [Member]	Jun. 30, 2014 North America Segment [Member]	Dec. 31, 2013 North America Segment [Member]	Jun. 30, 2014 Post-Acquisition Portfolio	Jun. 30, 2013 Post-Acquisition Portfolio	Jun. 30, 2014 Post-Acquisition Portfolio	Jun. 30, 2013 Post-Acquisition Portfolio	Jun. 30, 2014 Post-Acquisition Portfolio International Segment [Member]	Jun. 30, 2013 Post-Acquisition Portfolio International Segment [Member]	Jun. 30, 2014 Post-Acquisition Portfolio International Segment [Member]	Jun. 30, 2013 Post-Acquisition Portfolio International Segment [Member]	Jun. 30, 2014 Post-Acquisition Portfolio North America Segment [Member]	Jun. 30, 2013 Post-Acquisition Portfolio North America Segment [Member]	Jun. 30, 2014 Post-Acquisition Portfolio North America Segment [Member]	Jun. 30, 2013 Post-Acquisition Portfolio North America Segment [Member]
Accounts Notes And Loans Receivable Rollforward [Roll Forward]
Financing Receivable, Gross	$ 25,046	$ 23,130	$ 13,142	$ 11,742	$ 11,904	$ 11,388			$ 21,956	$ 8,831			$ 11,394	$ 0			$ 10,562	$ 8,831
Payments to Acquire Loans Receivable									7,045	3,827			4,128	1,117			2,917	2,710
Financing Receivable, Allowance for Credit Losses, Write-downs							(191)	(116)	(415)	(248)	(34)	0	(66)	0	(157)	(116)	(349)	(248)
Proceeds from Collection of Finance Receivables									(4,624)	(1,940)			(2,888)	(594)			(1,736)	(1,346)
Foreign Currency Translation - Finance Receivables									329	(12)			329	(12)			0	0
Financing Receivable, Gross	$ 25,046	$ 23,130	$ 13,142	$ 11,742	$ 11,904	$ 11,388	$ 24,291	$ 15,880	$ 24,291	$ 15,880	$ 12,897	$ 5,933	$ 12,897	$ 5,933	$ 11,394	$ 9,947	$ 11,394	$ 9,947