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Restructuring and impairment charges - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 27, 2021	Jun. 27, 2021	Jun. 28, 2020
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	$ 6,739	$ 6,739	$ 0
Termination benefits | Respiratory divestiture plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	2,500	2,500
Termination benefits | 2021 Restructuring plan
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	5,100	5,100
Other Restructuring costs
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	6,739	6,739
Minimum | Respiratory divestiture plan
Restructuring Cost and Reserve [Line Items]
Aggregate capital expenditures		22,000
Expected restructuring charges	24,000	24,000
Minimum | Termination benefits | 2021 Restructuring plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	7,000	7,000
Minimum | Other Restructuring costs | 2021 Restructuring plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	3,000	3,000
Maximum | Respiratory divestiture plan
Restructuring Cost and Reserve [Line Items]
Aggregate capital expenditures		28,000
Expected restructuring charges	30,000	30,000
Maximum | Termination benefits | 2021 Restructuring plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	9,000	9,000
Maximum | Other Restructuring costs | 2021 Restructuring plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring charges	$ 4,000	$ 4,000

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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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Future cash outflow to pay for purchases of fixed assets that have occurred.

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Amount expected to be recognized in earnings for the specified restructuring cost.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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