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Employee Benefit Plans - Other Retirement Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Jan. 02, 2021	Dec. 28, 2019	Dec. 29, 2018
Switzerland
Employee Benefit Plans
Pension gain (expense)	$ (1.3)	$ 0.7	$ (0.6)
Employee benefit plan obligations included in other long-term liabilities	14.5	17.0
France
Employee Benefit Plans
Pension gain (expense)	0.2	(0.4)	0.4
Employee benefit plan obligations included in other long-term liabilities	1.2
Restricted Stock and Restricted Stock Units
Employee Benefit Plans
Fair value of restricted stock and restricted stock units, vested	$ 4.8	$ 17.6	$ 16.6

X

- Definition

Amount of liability, recognized in statement of financial position, for defined benefit pension plan, classified as noncurrent. Excludes other postretirement benefit plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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+ References

No definition available.

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- Definition

Amount of cost (reversal of cost) for pension and other postretirement benefits.

+ References

No definition available.

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- Definition

Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

+ References

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-Publisher FASB
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-SubTopic 10
-Section 50
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