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Impairment and Restructuring Charges (Tables) | 12 Months Ended
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Dec. 31, 2019
Impairment and Restructuring Charges |
Schedule of impairment and restructuring charges | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | Year Ended December 31,
​ | 2019 |  | 2018 |  | 2017
| (in millions)
Property, plant and equipment | $ | 1.2 | ​ | $ | 3.8 | ​ | $ | 4.2
Intangible assets, net | ​ | — | ​ | ​ | 33.2 | ​ | ​ | —
Total impairment charges | ​ | 1.2 | ​ | ​ | 37.0 | ​ | ​ | 4.2
Restructuring––cost of sales | ​ | — | ​ | ​ | — | ​ | ​ | (0.2)
Restructuring––warehouse, delivery, selling, general and administrative expense | ​ | — | ​ | ​ | 2.5 | ​ | ​ | 0.1
Total impairment and restructuring charges | $ | 1.2 | ​ | $ | 39.5 | ​ | $ | 4.1

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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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