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Restructuring (Tables) | 12 Months Ended
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Dec. 31, 2021
Restructuring And Related Activities [Abstract] |
Summary of Activity Relating to Restructuring Plan Liabilities | The following table summarizes activity relating to restructuring plan liabilities (in millions of dollars):
|  | Year Ended December 31, |
|  | 2021 |  |  | 2020 |
Beginning balance |  | $ | 1.4 |  |  | $ | — |
Restructuring costs |  |  | — |  |  |  | 12.4 |
Cash payments |  |  | (0.6 | ) |  |  | (6.1 | )
Other adjustments1 |  |  | (0.8 | ) |  |  | (4.9 | )
Ending balance |  | $ | — |  |  | $ | 1.4 |
| 1 | In December 2020, March 2021 and May 2021, we revised our production forecasts, thereby reducing the estimated number of headcount reductions necessary as compared with our initial restructuring plan. These reductions to accommodate the revised headcount requirements are included in Other adjustments with an offset to Restructuring (benefit) costs.

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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