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Employee Benefit Plans (Other Retirement Plans) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Switzerland
Employee Benefit Plans
Pension gain (expense)	$ (0.6)	$ (1.8)	$ (2.2)
Employee benefit plan obligations included in other long-term liabilities	9.5	12.5
France
Employee Benefit Plans
Pension gain (expense)	0.4	0.7	(0.2)
Employee benefit plan obligations included in other long-term liabilities	0.8	1.3
Restricted Stock and Restricted Stock Units
Employee Benefit Plans
Fair value of restricted stock and restricted stock units, vested	$ 16.6	$ 6.3	$ 12.3

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
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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+ References

No definition available.

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X

- 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
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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