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Restructuring and impairment charges (credits) - Charges Recognized (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2019	Sep. 30, 2018	Sep. 29, 2019	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,268	$ 1,964	$ 13,437	$ 58,515
Asset impairment charges		17,245	6,911	19,110
Restructuring and impairment charges	1,268	19,209	20,348	77,625
Termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	906	1,587	11,772	57,160
Asset impairment charges		0	0	0
Restructuring and impairment charges		1,587	11,772	57,160
Other Restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	362	377	1,665	1,355
Asset impairment charges		17,245	6,911	19,110
Restructuring and impairment charges		17,622	8,576	20,465
2019 Footprint realignment plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	622		13,168
2019 Footprint realignment plan | Termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	584		13,100
2019 Footprint realignment plan | Other Restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	38		68
2018 Footprint realignment plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	389	1,264	(741)	53,738
2018 Footprint realignment plan | Termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	315	1,119	(1,523)	53,463
2018 Footprint realignment plan | Other Restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	74	145	782	275
Other restructuring programs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	257	700	1,010	1,981
Other restructuring programs | Termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	7	468	195	1,318
Other restructuring programs | Other Restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 250	$ 232	$ 815	663
2016 Footprint realignment plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges				2,796
2016 Footprint realignment plan | Termination benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges				2,379
2016 Footprint realignment plan | Other Restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 417

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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