The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	Sep. 27, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Commitments [Line Items]
Non-cancelable purchase commitments	$ 45.8
Maximum amount of potential future payments under the company's financial guarantees	2.5	$ 2.3
Indemnification [Member]
Other Commitments [Line Items]
Accrual for indemnification provisions	0.0
Foreign Line of Credit [Member] \| Performance Guarantee [Member] \| Guarantee Obligations [Member]
Other Commitments [Line Items]
Line of Credit Facility, Current Borrowing Capacity			$ 2.0
Domestic Line of Credit [Member] \| Performance Guarantee [Member] \| Guarantee Obligations [Member]
Other Commitments [Line Items]
Bank Guarantees and Standby Letters of Credit			$ 2.2
Line of Credit Facility, Fair Value of Amount Outstanding	$ 0.0	$ 0.0