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Warranty Liability (Tables) | 3 Months Ended
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Mar. 31, 2019
Product Warranties Disclosures [Abstract] |
Schedule of changes in the Company's warranty liability | Changes in our warranty liability were as follows, in millions:
| Three Months Ended March 31, 2019 |  | Twelve Months Ended December 31, 2018
Balance at January 1 | $ | 217 |  |  | $ | 205 |
Accruals for warranties issued during the period | 19 |  |  | 78 |
Accruals related to pre-existing warranties | — |  |  | (1 | )
Settlements made (in cash or kind) during the period | (18 | ) |  | (65 | )
Balance at end of period | $ | 218 |  |  | $ | 217 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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