Condensed Consolidated Balance Sheets (Parenthetical) $ in Millions	Jun. 26, 2020 USD ($) $ / shares shares	Jun. 26, 2020 € / shares	Dec. 27, 2019 USD ($) $ / shares shares	Dec. 27, 2019 € / shares
Allowance for doubtful accounts \| $	$ 4.0		$ 4.0
Preferred shares, par value (in usd per share) \| $ / shares	$ 0.20		$ 0.20
Preferred shares, shares authorized (in shares)	500,000,000		500,000,000
Preferred shares, shares issued (in shares)	0		0
Preferred shares, shares outstanding (in shares)	0		0
Ordinary shares, par value (in usd per share) \| $ / shares	$ 0.20		$ 0.20
Ordinary shares, shares authorized (in shares)	500,000,000		500,000,000
Ordinary shares, shares issued (in shares)	94,059,693		93,459,206
Ordinary shares, shares outstanding (in shares)	84,564,406		84,105,786
Ordinary shares held in treasury at cost (in shares)	9,495,287		9,353,420
Ordinary A
Ordinary shares, par value (in usd per share) \| € / shares		€ 1.00		€ 1.00
Ordinary shares, shares authorized (in shares)	40,000		40,000
Ordinary shares, shares issued (in shares)	0		0
Ordinary A shares, shares outstanding (in shares)	0		0

Amount of allowance for credit loss on accounts receivable, classified as current.

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