Note 11: Guarantees (Details) (USD $) In Millions | 9 Months Ended | |
|---|---|---|
Sep. 30, 2011 | Sep. 30, 2010 | |
| Notes to Condensed Consolidated Financial Statements [Abstract] | ||
| Service and product warranties and product performance guarantees - beginning of year | $ 1,136 | $ 1,072 |
| Warranties and performance guarantees issued | 370 | 310 |
| Settlements made | (333) | (271) |
| Product warranty accrual - other | 315 | (6) |
| Service and product warranties and product performance guarantees - end of period | $ 1,488 | $ 1,105 |