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Restructuring and impairment charges (credits) - Charges Recognized (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jul. 01, 2018 | Jun. 30, 2019 | Jul. 01, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | $ (2,196) | $ 53,488 | $ 12,169 | $ 56,551
Asset impairment charges | 3,881 | 1,865 | 6,911 | 1,865
Restructuring and impairment charges | 1,685 | 55,353 | 19,080 | 58,416
Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | (2,672) | 52,919 | 10,866 | 55,576
Asset impairment charges | 0 | 0 | 0 | 0
Restructuring and impairment charges | (2,672) | 52,919 | 10,866 | 55,576
Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | 476 | 569 | 1,303 | 975
Asset impairment charges | 3,881 | 1,865 | 6,911 | 1,865
Restructuring and impairment charges | 4,357 | 2,434 | 8,214 | 2,840
2019 Footprint realignment plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | (429) |  | 12,546 |
2019 Footprint realignment plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | (459) |  | 12,516 |
2019 Footprint realignment plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | 30 |  | 30 |
2018 Footprint realignment plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | (2,141) | 52,474 | (1,130) | 52,474
2018 Footprint realignment plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | (2,275) | 52,345 | (1,838) | 52,345
2018 Footprint realignment plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | 134 | 129 | 708 | 129
Other restructuring programs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | 374 | 1,014 | 753 | 1,587
Other restructuring programs | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | 62 | 574 | 188 | 1,032
Other restructuring programs | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) | $ 312 | $ 440 | $ 565 | 555
2016 Footprint realignment plan |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) |  |  |  | 2,490
2016 Footprint realignment plan | Termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) |  |  |  | 2,199
2016 Footprint realignment plan | Other Restructuring costs |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring charges (credits) |  |  |  | $ 291

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