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Employee Benefit Plans (Other Retirement Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Switzerland
Employee Benefit Plans
Pension gain (expense)	$ 0.7	$ (0.6)	$ (1.8)
Employee benefit plan obligations included in other long-term liabilities	17.0	9.5
France
Employee Benefit Plans
Pension gain (expense)	(0.4)	0.4	0.7
Employee benefit plan obligations included in other long-term liabilities	1.2	0.8
Restricted Stock and Restricted Stock Units
Employee Benefit Plans
Fair value of restricted stock and restricted stock units, vested	$ 17.6	$ 16.6	$ 6.3

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
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-Section S99
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+ References

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- Definition

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

+ References

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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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