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Guarantees (Tables) | 3 Months Ended
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Mar. 31, 2017
Service and Product Warranties and Product Performance Guarantees [Abstract] |
Product Warranty Disclosure [Table Text Block] | The changes in the carrying amount of service and product warranties and product performance guarantees for the quarter ended March 31, 2017 and 2016 are as follows:
(Dollars in millions) |  | 2017 |  | 2016
Balance as of January 1 |  | $ | 1,199 |  |  | $ | 1,212 |
Warranties and performance guarantees issued |  | 78 |  |  | 76 |
Settlements made |  | (56 | ) |  | (62 | )
Other |  | 1 |  |  | 10 |
Balance as of March 31 |  | $ | 1,222 |  |  | $ | 1,236 |

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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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- Definition Service and Product Warranties and Product Performance Guarantees [Abstract] + References No definition available. + Details
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