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Restructuring, Asset Impairments and Other Charges, net (Tables) | 12 Months Ended
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Dec. 31, 2020
Restructuring Charges [Abstract] |
Summary of Restructuring, Asset Impairments and Other, Net | Details of restructuring, asset impairments and other charges, net are as follows (in millions):
|  | Restructuring |  | Asset Impairments (1) |  | Other |  | Total |
Year Ended December 31, 2020 |  |  |  |  |  |  |  |  |
Voluntary separation program |  | $ | 27.5 |  |  | $ | — |  |  | $ | — |  |  | $ | 27.5 |  |
2020 Involuntary separation program |  | 11.8 |  |  | — |  |  | — |  |  | 11.8 |  |
General workforce reduction |  | 12.3 |  |  | — |  |  | — |  |  | 12.3 |  |
Other |  | — |  |  | 17.5 |  |  | (3.9) |  |  | 13.6 |  |
Total |  | $ | 51.6 |  |  | $ | 17.5 |  |  | $ | (3.9) |  |  | $ | 65.2 |  |
Year Ended December 31, 2019 |  |  |  |  |  |  |  |  |
General workforce reduction |  | $ | 8.4 |  |  | $ | — |  |  | $ | — |  |  | $ | 8.4 |  |
Post-Quantenna acquisition restructuring |  | 15.7 |  |  | — |  |  | — |  |  | 15.7 |  |
Other |  | 0.8 |  |  | 3.4 |  |  | 0.4 |  |  | 4.6 |  |
Total |  | $ | 24.9 |  |  | $ | 3.4 |  |  | $ | 0.4 |  |  | $ | 28.7 |  |
Year Ended December 31, 2018 |  |  |  |  |  |  |  |  |
Other |  | $ | 3.9 |  |  | $ | 4.6 |  |  | $ | (4.2) |  |  | $ | 4.3 |  |
Total |  | $ | 3.9 |  |  | $ | 4.6 |  |  | $ | (4.2) |  |  | $ | 4.3 |  |
_______________________ (1) The asset impairment charges recorded during the year ended December 31, 2020 related to a) property, plant and equipment amounting to $9.1 million b) investments in certain entities where the Company does not exert a significant influence amounting to $7.0 million and c) lease right-of-use assets of $1.4 million.
Rollforward of Accrued Restructuring Charges | Summary of changes in accrued restructuring charges as follows (in millions):
|  | Estimated employee separation charges |  | Estimated costs to exit |  | Total
Balance as of December 31, 2018 |  | $ | 0.3 |  |  | $ | 0.2 |  |  | $ | 0.5 |
Charges |  | 24.9 |  |  | — |  |  | 24.9 |
Usage |  | (25.1) |  |  | (0.1) |  |  | (25.2) |
Balance as of December 31, 2019 |  | $ | 0.1 |  |  | $ | 0.1 |  |  | $ | 0.2 |
Charges |  | 51.6 |  |  | — |  |  | 51.6 |
Usage |  | (45.5) |  |  | (0.1) |  |  | (45.6) |
Balance as of December 31, 2020 |  | $ | 6.2 |  |  | $ | — |  |  | $ | 6.2 |

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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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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: 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(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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