Condensed Consolidated Balance Sheets (Parenthetical) $ in Millions	Mar. 29, 2019 € / shares	Mar. 29, 2019 USD ($) $ / shares shares	Dec. 28, 2018 € / shares	Dec. 28, 2018 USD ($) $ / shares shares
Allowance for doubtful accounts \| $		$ 4.3		$ 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 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)		92,912,986		92,705,747
Ordinary shares, shares outstanding (in shares)		83,536,829		83,323,877
Ordinary shares held in treasury at cost (in shares)		9,376,157		9,381,870
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

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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