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Restructuring and impairment (credits) charges - Charges Recognized (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 27, 2020 | Sep. 29, 2019 | Sep. 27, 2020 | Sep. 29, 2019
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ (3,659) | $ 1,268 | $ 16,692 | $ 13,437
Asset impairment charges |  |  |  | 6,911
Restructuring and impairment charges | (3,659) | 1,268 | 16,692 | 20,348
Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (4,413) | 906 | 15,224 | 11,772
Asset impairment charges |  |  |  | 0
Restructuring and impairment charges |  |  |  | 11,772
Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 754 | 362 | 1,468 | 1,665
Asset impairment charges |  |  |  | 6,911
Restructuring and impairment charges |  |  |  | 8,576
2020 Workforce reduction plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (216) |  | 10,348 |
2020 Workforce reduction plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (471) |  | 10,093 |
2020 Workforce reduction plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 255 |  | 255 |
2019 Footprint realignment plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (417) | 622 | 826 | 13,168
2019 Footprint realignment plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (785) | 584 | 367 | 13,100
2019 Footprint realignment plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 368 | 38 | 459 | 68
2018 Footprint realignment plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (2,923) | 389 | 5,069 | (741)
2018 Footprint realignment plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (3,006) | 315 | 4,853 | (1,523)
2018 Footprint realignment plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | 83 | 74 | 216 | 782
Other restructuring programs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (103) | 257 | 449 | 1,010
Other restructuring programs | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | (151) | 7 | (89) | 195
Other restructuring programs | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges | $ 48 | $ 250 | $ 538 | $ 815

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