Pension, Postretirement and Postemployment Benefits - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Pension
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 0.0	$ 0.0	$ 1.2
Interest cost	1.1	1.5	6.6
Expected return on assets	0.0	0.0	(6.2)
Amortization of actuarial loss	1.0	0.7	7.6
Curtailment/Settlement losses	0.5	0.0	111.0
Net periodic benefit cost (income)	2.6	2.2	120.2
Pension | UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	1.1	1.5
Postretirement
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.0	0.0	0.9
Interest cost	0.8	0.9	1.3
Net periodic benefit cost (income)	0.8	0.9	$ 2.2
Postretirement | UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	$ 0.8	$ 0.9