Financing Receivables (Details 7) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014
Past Due Financing Receivable
Total Past Due (> 90 days)	$ 87	[1]	$ 82	[1]
Current	19,883		22,250
Total Financing Receivables	19,970		22,332
Recorded Investment > 90 Days and Accruing	46		47
Troubled debt restructurings of financing receivables	0		0
Major Markets
Past Due Financing Receivable
Total Financing Receivables	14,176		15,751
Growth Markets
Past Due Financing Receivable
Total Financing Receivables	5,793		6,581
Lease receivables
Past Due Financing Receivable
Total Past Due (> 90 days)	46	[1]	38	[1]
Current	7,060		7,607
Total Financing Receivables	7,105		7,645
Recorded Investment > 90 Days and Accruing	23		20
Lease receivables | Major Markets
Past Due Financing Receivable
Total Past Due (> 90 days)	7	[1]	6	[1]
Current	5,258		5,696
Total Financing Receivables	5,265		5,702
Recorded Investment > 90 Days and Accruing	7		6
Lease receivables | Growth Markets
Past Due Financing Receivable
Total Past Due (> 90 days)	39	[1]	32	[1]
Current	1,801		1,911
Total Financing Receivables	1,840		1,943
Recorded Investment > 90 Days and Accruing	16		14
Loan receivables
Past Due Financing Receivable
Total Past Due (> 90 days)	41	[1]	44	[1]
Current	12,824		14,643
Total Financing Receivables	12,864		14,687
Recorded Investment > 90 Days and Accruing	23		27
Loan receivables | Major Markets
Past Due Financing Receivable
Total Past Due (> 90 days)	11	[1]	9	[1]
Current	8,901		10,040
Total Financing Receivables	8,911		10,049
Recorded Investment > 90 Days and Accruing	10		9
Loan receivables | Growth Markets
Past Due Financing Receivable
Total Past Due (> 90 days)	30	[1]	35	[1]
Current	3,923		4,603
Total Financing Receivables	3,953		4,639
Recorded Investment > 90 Days and Accruing	$ 13		$ 18

[1] Does not include accounts that are fully reserved.