Share-Based Awards - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 27, 2019	Sep. 28, 2018
Share-based Payment Arrangement [Abstract]
Share-based compensation expense	$ 23.2	$ 22.0
Unrecognized compensation cost	$ 8.2
Weighted average recognition period	2 years 4 months 24 days
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock purchase plan shares issued	398,000	480,000
Stock purchase plan discount from market value	15.00%

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Discount rate from fair value on offering date that participants pay for shares.

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Number of shares issued during the period as a result of an employee stock purchase plan.

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