Restructuring and impairment charges - Charges recognized (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2023	Jun. 26, 2022	Jul. 02, 2023	Jun. 26, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 1,508	$ (83)	$ 3,729	$ 825
Asset impairment charges			0	1,497
Restructuring and impairment charges	1,508	(83)	3,729	2,322
Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,184	(524)	3,131	202
Asset impairment charges				0
Restructuring and impairment charges				202
Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	324	441	598	623
Asset impairment charges				1,497
Restructuring and impairment charges				2,120
2022 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	1,122		3,328
2022 Restructuring Plan | Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	984		3,117
2022 Restructuring Plan | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	138		211
Respiratory divestiture plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges	127	160	267	280
Respiratory divestiture plan | Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	127	129	255	235
Respiratory divestiture plan | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	31	12	45
2019 Footprint realignment plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(379)		(1,025)
2019 Footprint realignment plan | Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges		(400)		(1,070)
2019 Footprint realignment plan | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		21		45
2018 Footprint realignment plan
Restructuring Cost and Reserve [Line Items]
Restructuring charges		386		606
2018 Footprint realignment plan | Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges		153		311
2018 Footprint realignment plan | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges		233		295
Other restructuring programs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	259	(250)	134	964
Other restructuring programs | Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	73	(406)	(241)	726
Other restructuring programs | Other restructuring costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 186	$ 156	$ 375	$ 238