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v3.21.2

Restructuring and Other Items, net (Details) $ in Millions | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Oct. 03, 2021 USD ($) | Sep. 27, 2020 USD ($) | Jun. 28, 2020 USD ($) Mill | Jun. 28, 2020 Mill | Oct. 03, 2021 USD ($) | Sep. 27, 2020 USD ($)
Restructuring Charges [Abstract] |  |  |  |  |  |
Asset write-downs | $ 0.7 | $ 1.1 |  |  | $ 0.7 | $ 7.1
Severance and other related costs | 0.4 | 0.3 |  |  | 0.4 | 0.6
Total restructuring and other items, net | 1.1 | 1.5 |  |  | 1.1 | 8.0
Restructuring Liability [Roll Forward] |  |  |  |  |  |
Restructuring liability, beginning of period |  |  |  |  | 3.6 |
Additional provision |  |  |  |  | 0.1 |
Cash payments |  |  |  |  | (1.3) |
Restructuring liability, end of period | 2.4 |  |  |  | 2.4 |
Paper PCC [Member] |  |  |  |  |  |
Restructuring and Other Items, Net [Abstract] |  |  |  |  |  |
Number of mills with lease terminations | Mill |  |  | 1 | 1 |  |
Specialty Minerals [Member] |  |  |  |  |  |
Restructuring Charges [Abstract] |  |  |  |  |  |
Asset write-downs | 0.7 | 1.1 |  |  | 0.7 | 7.1
Severance and other related costs | 0.4 | 0.3 |  |  | 0.4 | 0.6
Specialty Minerals [Member] | Paper PCC [Member] |  |  |  |  |  |
Restructuring Charges [Abstract] |  |  |  |  |  |
Asset write-downs | 0.7 | 1.1 | $ 6.0 |  |  |
Severance and other related costs | 0.4 |  | $ 0.3 |  |  |
Corporate [Member] |  |  |  |  |  |
Restructuring Charges [Abstract] |  |  |  |  |  |
Other | $ 0.0 | $ 0.1 |  |  | $ 0.0 | $ 0.3
Verso Papers [Member] |  |  |  |  |  |
Restructuring and Other Items, Net [Abstract] |  |  |  |  |  |
Number of paper mills being idled indefinitely | Mill |  |  | 2 | 2 |  |

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