Financing Receivables (Details 7) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Past Due Financing Receivable
Fully reserved financing receivable	$ 530	$ 517
Less than 90 Days or Unbilled Financing Receivables	18,353	19,355
Total Financing Receivables	18,959	19,945
Recorded Investment > 90 Days and Accruing	416	388
Troubled debt restructurings of financing receivables	0	0
Total Past Due > 90 days
Past Due Financing Receivable
Total Past Due > 90 days	76	73
Major Markets
Past Due Financing Receivable
Total Financing Receivables	14,495	15,256
Growth Markets
Past Due Financing Receivable
Total Financing Receivables	4,463	4,689
Lease receivables
Past Due Financing Receivable
Fully reserved financing receivable	215	173
Less than 90 Days or Unbilled Financing Receivables	6,779	6,834
Total Financing Receivables	7,027	7,041
Recorded Investment > 90 Days and Accruing	192	168
Lease receivables | Total Past Due > 90 days
Past Due Financing Receivable
Total Past Due > 90 days	33	35
Lease receivables | Major Markets
Past Due Financing Receivable
Fully reserved financing receivable	33	33
Less than 90 Days or Unbilled Financing Receivables	5,420	5,479
Total Financing Receivables	5,461	5,517
Recorded Investment > 90 Days and Accruing	128	108
Lease receivables | Major Markets | Total Past Due > 90 days
Past Due Financing Receivable
Total Past Due > 90 days	7	5
Lease receivables | Growth Markets
Past Due Financing Receivable
Fully reserved financing receivable	182	140
Less than 90 Days or Unbilled Financing Receivables	1,358	1,355
Total Financing Receivables	1,566	1,524
Recorded Investment > 90 Days and Accruing	64	60
Lease receivables | Growth Markets | Total Past Due > 90 days
Past Due Financing Receivable
Total Past Due > 90 days	26	30
Loan receivables
Past Due Financing Receivable
Fully reserved financing receivable	315	344
Less than 90 Days or Unbilled Financing Receivables	11,574	12,521
Total Financing Receivables	11,931	12,904
Recorded Investment > 90 Days and Accruing	224	220
Loan receivables | Total Past Due > 90 days
Past Due Financing Receivable
Total Past Due > 90 days	42	38
Loan receivables | Major Markets
Past Due Financing Receivable
Fully reserved financing receivable	36	35
Less than 90 Days or Unbilled Financing Receivables	8,989	9,696
Total Financing Receivables	9,034	9,739
Recorded Investment > 90 Days and Accruing	150	134
Loan receivables | Major Markets | Total Past Due > 90 days
Past Due Financing Receivable
Total Past Due > 90 days	10	7
Loan receivables | Growth Markets
Past Due Financing Receivable
Fully reserved financing receivable	279	309
Less than 90 Days or Unbilled Financing Receivables	2,585	2,825
Total Financing Receivables	2,897	3,165
Recorded Investment > 90 Days and Accruing	74	86
Loan receivables | Growth Markets | Total Past Due > 90 days
Past Due Financing Receivable
Total Past Due > 90 days	$ 33	$ 31