Restructuring and Other Charges, Net - Expected, incurred and remaining pre-tax restructuring costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2020	Jun. 28, 2020	Sep. 27, 2020	Sep. 29, 2019
Summary of total expected, incurred and remaining pre-tax costs
Costs incurred	$ 3.4		$ 8.7	$ 2.7
Other Actions
Summary of total expected, incurred and remaining pre-tax costs
Costs incurred	3.4		8.7	$ 2.7
2020 Other Actions
Summary of total expected, incurred and remaining pre-tax costs
Costs incurred	3.4	$ 5.6	9.0
Total expected restructuring costs	11.0		11.0
2020 Other Actions \| Severance
Summary of total expected, incurred and remaining pre-tax costs
Costs incurred	3.1	5.3
Total expected restructuring costs	8.4		8.4
2020 Other Actions \| Asset write-downs
Summary of total expected, incurred and remaining pre-tax costs
Costs incurred	0.3	$ 0.3
Total expected restructuring costs	1.5		1.5
2020 Other Actions \| Facility exit and other
Summary of total expected, incurred and remaining pre-tax costs
Total expected restructuring costs	$ 1.1		$ 1.1