Earnings Per Share and Shareholders' Equity (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 29, 2019	Mar. 30, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 29, 2019	Jun. 30, 2018	Oct. 31, 2018
Numerator:
Net income	$ 9.0	$ 63.9	$ 36.2	$ 80.8	$ 72.9	$ 117.0
Denominator:
Weighted average shares outstanding for basic EPS	136.0		138.1		136.0	139.5
Dilutive effect of share-based awards (in shares)	0.5		0.6		0.3	0.5
Weighted average shares outstanding for diluted EPS	136.5		138.7		136.3	140.0
Anti-dilutive share-based awards excluded from computation of diluted EPS (shares)	1.7		1.7		1.8	0.9
Stock repurchase program, authorized amount							$ 1,000.0
Repurchases of ordinary shares (shares)	0.0				0.0
Share price (in dollars per share)			$ 79.42			$ 80.42
Repurchase of equity amount			$ 156.9			$ 265.0
Ordinary Shares Issued
Denominator:
Repurchases of ordinary shares (shares)			2.0	1.3		3.3