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Restructuring, Asset Impairments and Other Charges, net - Summary of Restructuring, Asset Impairments and Other, Net (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 03, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring |  | $ 51.6 | $ 24.9 | $ 3.9
Asset Impairments |  | 17.5 | 3.4 | 4.6
Other |  | (3.9) | 0.4 | (4.2)
Total |  | 65.2 | 28.7 | 4.3
Property, plant and equipment impairment |  | 9.1 |  |
Impairment of investments |  | 7.0 |  |
Impairment charges for ROU assets |  | 1.4 |  |
Other |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring |  | 0.0 | 0.8 | 3.9
Asset Impairments |  | 17.5 | 3.4 | 4.6
Other |  | (3.9) | 0.4 | (4.2)
Total |  | 13.6 | 4.6 | $ 4.3
Voluntary separation program | Workforce Reduction |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring |  | 27.5 |  |
Asset Impairments |  | 0.0 |  |
Other |  | 0.0 |  |
Total | $ 27.5 | 27.5 |  |
2020 Involuntary separation program | Workforce Reduction |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring |  | 11.8 |  |
Asset Impairments |  | 0.0 |  |
Other |  | 0.0 |  |
Total |  | 11.8 |  |
General workforce reduction | Workforce Reduction |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring |  | 12.3 | 8.4 |
Asset Impairments |  | 0.0 | 0.0 |
Other |  | 0.0 | 0.0 |
Total |  | $ 12.3 | 8.4 |
Post-Quantenna acquisition restructuring |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring |  |  | 15.7 |
Asset Impairments |  |  | 0.0 |
Other |  |  | 0.0 |
Total |  |  | $ 15.7 |

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