Consolidated Balance Sheets (Parenthetical) $ in Millions	Dec. 27, 2019 USD ($) $ / shares shares	Dec. 27, 2019 € / shares	Dec. 28, 2018 USD ($) $ / shares shares	Dec. 28, 2018 € / shares
Accounts Receivable, Allowance for Credit Loss, Current | $	$ 4.0		$ 5.0
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 A shares, par value (in eur per share) | € / shares		€ 1.00		€ 1.00
Ordinary A shares, shares authorized (in shares)	40,000		40,000
Ordinary A shares, shares issued (in shares)	0		0
Ordinary A 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)	93,459,206		92,705,747
Ordinary shares, shares outstanding (in shares)	84,105,786		83,323,877
Ordinary shares held in treasury (in shares)	9,353,420		9,381,870