|
Fair Value of Short Term and Long Term Debt Excluding Capital Leases (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Short- and long-term debt | $ 113,271 | $ 93,591 |
| Carrying Amount, Fair Value Disclosure | Excluding Capital Leases | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Short- and long-term debt | 112,755 | 93,298 |
| Estimate of Fair Value Measurement | Excluding Capital Leases | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Short- and long-term debt | $ 126,549 | $ 103,527 |