| Standard Warranty Liability | |||||||
| ($ in millions) | |||||||
| 2013 | 2012 | ||||||
| Balance at January 1 | $ | 394 | $ | 407 | |||
| Current period accruals | 346 | 394 | |||||
| Accrual adjustments to reflect experience | 22 | (15) | |||||
| Changes incurred | (387) | (392) | |||||
| Balance at December 31 | $ | 376 | $ | 394 | |||
| Extended Warranty Liability (Deferred Income) | ||||||||
| ($ in millions) | ||||||||
| 2013 | 2012 | |||||||
| Balance at January 1 | $ | 606 | $ | 636 | ||||
| Revenue deferred for new extended warranty contracts | 305 | 268 | ||||||
| Amortization of deferred revenue | (324) | (301) | ||||||
| Other* | (8) | 4 | ||||||
| Balance at December 31 | $ | 579 | $ | 606 | ||||
| Current portion | $ | 284 | $ | 289 | ||||
| Noncurrent portion | 295 | 317 | ||||||
| Balance at December 31 | $ | 579 | $ | 606 | ||||
| * Other consists primarily of foreign currency translation adjustments. | ||||||||