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Restructuring and impairment charges - Charges Recognized (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 27, 2021 | Jun. 28, 2020 | Jun. 27, 2021 | Jun. 28, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ 4,755 | $ 19,005 | $ 12,753 | $ 20,351
Asset impairment charges | 6,739 |  | 6,739 | 0
Restructuring and impairment charges | 11,494 | 19,005 | 19,492 | 20,351
Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 3,823 | 18,601 | 11,025 | 19,637
Asset impairment charges | 0 |  | 0 |
Restructuring and impairment charges | 3,823 |  | 11,025 |
Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 932 | 404 | 1,728 | 714
Asset impairment charges | 6,739 |  | 6,739 |
Restructuring and impairment charges | 7,671 |  | 8,467 |
Respiratory divestiture plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 2,541 |  | 2,541 |
Respiratory divestiture plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 2,540 |  | 2,540 |
Respiratory divestiture plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 1 |  | 1 |
2021 Restructuring plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 152 |  | 6,912 |
2021 Restructuring plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 129 |  | 6,889 |
2021 Restructuring plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 23 |  | 23 |
2020 Workforce reduction plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  | 10,564 |  | 10,564
2020 Workforce reduction plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  | 10,564 |  | 10,564
2020 Workforce reduction plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges |  | 0 |  | 0
2019 Footprint realignment plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (210) | 405 | 236 | 1,243
2019 Footprint realignment plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (301) | 323 | 40 | 1,152
2019 Footprint realignment plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 91 | 82 | 196 | 91
2018 Footprint realignment plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 1,551 | 7,597 | 1,863 | 7,992
2018 Footprint realignment plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 1,459 | 7,545 | 1,726 | 7,859
2018 Footprint realignment plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 92 | 52 | 137 | 133
Other restructuring programs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 721 | 439 | 1,201 | 552
Other restructuring programs | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (4) | 169 | (170) | 62
Other restructuring programs | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ 725 | $ 270 | $ 1,371 | $ 490

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