Business Overview - Accumulated Other Comprehensive Income (Details) $ in Millions	3 Months Ended
	Mar. 29, 2019 USD ($)	Mar. 30, 2018 USD ($)	Mar. 29, 2019 JPY (¥)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Gain (loss) in OCI related to the net investment hedge	$ 7.2	$ (14.8)
Other Comprehensive Income (Loss), before Tax [Abstract]
Equity, beginning of period	(86.6)
Other comprehensive income (loss) before reclassifications, net of income taxes	16.7	36.4
Amounts reclassified from accumulated other comprehensive income (loss):
Increase (decrease)	0.7	0.9
Income tax impact	(0.2)	(0.2)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0.5	0.7
Total other comprehensive income, net of income taxes	17.2	37.1
Equity, end of period	(69.4)
Foreign currency translation adjustments
Other Comprehensive Income (Loss), before Tax [Abstract]
Equity, beginning of period	(29.3)	64.0
Other comprehensive income (loss) before reclassifications, net of income taxes	16.7	36.4
Amounts reclassified from accumulated other comprehensive income (loss):
Increase (decrease)	0.0	0.0
Income tax impact	0.0	0.0
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0.0	0.0
Total other comprehensive income, net of income taxes	16.7	36.4
Equity, end of period	(12.6)	100.4
Pension adjustments
Other Comprehensive Income (Loss), before Tax [Abstract]
Equity, beginning of period	(57.3)	(71.6)
Other comprehensive income (loss) before reclassifications, net of income taxes	0.0	0.0
Amounts reclassified from accumulated other comprehensive income (loss):
Increase (decrease)	0.7	0.9
Income tax impact	(0.2)	(0.2)
Amounts reclassified from accumulated other comprehensive income (loss), net of income taxes	0.5	0.7
Total other comprehensive income, net of income taxes	0.5	0.7
Equity, end of period	(56.8)	(70.9)
Accumulated Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss), before Tax [Abstract]
Equity, beginning of period	(86.6)	(7.6)
Amounts reclassified from accumulated other comprehensive income (loss):
Total other comprehensive income, net of income taxes	17.2	37.1
Equity, end of period	$ (69.4)	$ 29.5
Yen variable interest rate term loan due 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Term loan facility, aggregate amount | ¥			¥ 13,800,000,000