Finance Receivables Finance Receivables, net (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables, net	$ 30,546,000,000	$ 29,282,000,000
North America Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables, net	13,239,000,000	12,878,000,000
International Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Finance receivables, net	17,307,000,000	16,404,000,000
Consumer Finance Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	24,024,000,000	23,130,000,000
Financing Receivable, Collectively Evaluated for Impairment	22,230,000,000	21,189,000,000
Financing Receivable, Individually Evaluated for Impairment	864,000,000	767,000,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	(433,000,000)	(394,000,000)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	(104,000,000)	(103,000,000)
Notes, Loans and Financing Receivable, Net	23,487,000,000	22,633,000,000
Consumer Finance Receivables | North America Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	11,556,000,000	11,388,000,000
Financing Receivable, Collectively Evaluated for Impairment	10,047,000,000	9,795,000,000
Financing Receivable, Individually Evaluated for Impairment	864,000,000	767,000,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	(387,000,000)	(365,000,000)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	(104,000,000)	(103,000,000)
Notes, Loans and Financing Receivable, Net	11,065,000,000	10,920,000,000
Loans and Leases Receivable, Gross, Consumer, Lease Financing	1,000,000,000
Consumer Finance Receivables | International Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	12,468,000,000	11,742,000,000
Financing Receivable, Collectively Evaluated for Impairment	12,183,000,000	11,394,000,000
Financing Receivable, Individually Evaluated for Impairment	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	(46,000,000)	(29,000,000)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Notes, Loans and Financing Receivable, Net	12,422,000,000	11,713,000,000
Commercial Finance Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	7,108,000,000	6,700,000,000
Financing Receivable, Collectively Evaluated for Impairment	7,030,000,000	6,602,000,000
Financing Receivable, Individually Evaluated for Impairment	78,000,000	98,000,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	(43,000,000)	(44,000,000)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	(6,000,000)	(7,000,000)
Notes, Loans and Financing Receivable, Net	7,059,000,000	6,649,000,000
Commercial Finance Receivables | North America Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	2,190,000,000	1,975,000,000	883,000,000	560,000,000
Financing Receivable, Collectively Evaluated for Impairment	2,190,000,000	1,975,000,000
Financing Receivable, Individually Evaluated for Impairment	0	0
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	(16,000,000)	(17,000,000)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0	0
Notes, Loans and Financing Receivable, Net	2,174,000,000	1,958,000,000
Commercial Finance Receivables | International Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	4,918,000,000	4,725,000,000
Financing Receivable, Collectively Evaluated for Impairment	4,840,000,000	4,627,000,000
Financing Receivable, Individually Evaluated for Impairment	78,000,000	98,000,000
Financing Receivable, Allowance for Credit Losses, Collectively Evaluated for Impairment	(27,000,000)	(27,000,000)
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	(6,000,000)	(7,000,000)
Notes, Loans and Financing Receivable, Net	4,885,000,000	4,691,000,000
Pre-Acquisition Portfolio
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes Receivable Carrying Amount	285,000,000	348,000,000
Pre-Acquisition Portfolio | Consumer Finance Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	1,028,000,000	1,294,000,000
Notes Receivable Carrying Amount	930,000,000	1,174,000,000
Pre-Acquisition Portfolio | Consumer Finance Receivables | North America Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	735,000,000	931,000,000
Notes Receivable Carrying Amount	645,000,000	826,000,000
Pre-Acquisition Portfolio | Consumer Finance Receivables | International Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing Receivable, Gross	$ 293,000,000	$ 363,000,000