Pension, Postretirement and Postemployment Benefits - Summary of Changes in Projected Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 25, 2022	Dec. 26, 2021
Pension
Change in Projected Benefit Obligation
Interest cost	$ 1.6	$ 1.1	$ 1.1
Pension | UNITED STATES
Change in Projected Benefit Obligation
Projected benefit obligation — beginning	30.3	41.6
Interest cost	1.6	1.1
Actuarial loss (gain)	1.5	(9.3)
Benefits paid	(3.3)	(3.1)
Plan amendments	0.0	0.0
Projected benefit obligation — ending	30.1	30.3	41.6
Accumulated benefit obligation — ending	30.1	30.3
Change in Plan Assets
Fair value of plan assets — beginning	0.0	0.0
Fair value of plan assets — ending	0.0	0.0	0.0
Reconciliation of Funded Status
Projected benefit obligation	(30.1)	(30.3)	(41.6)
Fair value of plan assets	0.0	0.0	0.0
Funded status	(30.1)	(30.3)
Unrecognized prior service cost (credit)	0.0	0.0
Unrecognized net loss (earnings)	4.6	3.2
Net amount	(25.5)	(27.1)
Accrued liabilities	(3.0)	(3.0)
Other liabilities	(27.1)	(27.3)
Accumulated other comprehensive (earnings) loss	4.6	3.2
Postretirement
Change in Projected Benefit Obligation
Interest cost	1.1	0.8	0.8
Postretirement | UNITED STATES
Change in Projected Benefit Obligation
Projected benefit obligation — beginning	19.6	28.1
Interest cost	1.1	0.8
Actuarial loss (gain)	1.1	(7.6)
Benefits paid	(1.6)	(1.7)
Plan amendments	0.0	0.0
Projected benefit obligation — ending	20.2	19.6	28.1
Accumulated benefit obligation — ending	20.2	19.6
Change in Plan Assets
Fair value of plan assets — beginning	0.0	0.0
Fair value of plan assets — ending	0.0	0.0	0.0
Reconciliation of Funded Status
Projected benefit obligation	(20.2)	(19.6)	(28.1)
Fair value of plan assets	0.0	0.0	$ 0.0
Funded status	(20.2)	(19.6)
Unrecognized prior service cost (credit)	(0.6)	(0.9)
Unrecognized net loss (earnings)	(2.6)	(3.8)
Net amount	(23.4)	(24.3)
Accrued liabilities	(1.5)	(1.5)
Other liabilities	(18.7)	(18.0)
Accumulated other comprehensive (earnings) loss	$ (3.2)	$ (4.8)