Pension, Postretirement and Postemployment Benefits - Summary of Changes in Projected Benefit Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 25, 2022	Dec. 26, 2021	Dec. 27, 2020
Pension
Change in Projected Benefit Obligation
Interest cost	$ 1.1	$ 1.1	$ 1.5
Pension | UNITED STATES
Change in Projected Benefit Obligation
Projected benefit obligation — beginning	41.6	46.0
Interest cost	1.1	1.1
Transfer in	0.0	0.0
Actuarial (gain) loss	(9.3)	(1.1)
Benefits paid	(3.1)	(3.1)
Plan amendments	0.0	0.0
Settlements paid	0.0	(1.3)
Projected benefit obligation — ending	30.3	41.6	46.0
Accumulated benefit obligation — ending	30.3	41.6
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	(30.3)	(41.6)	(46.0)
Fair value of plan assets	0.0	0.0	0.0
Funded status	(30.3)	(41.6)
Unrecognized prior service cost (credit)	0.0	0.0
Unrecognized net loss	3.2	13.2
Net amount	(27.1)	(28.4)
Accrued liabilities	(3.0)	(3.2)
Other liabilities	(27.3)	(38.4)
Accumulated other comprehensive (earnings) loss	3.2	13.2
Net amount	(27.1)	(28.4)
Postretirement
Change in Projected Benefit Obligation
Interest cost	0.8	0.8	0.9
Postretirement | UNITED STATES
Change in Projected Benefit Obligation
Projected benefit obligation — beginning	28.1	29.9
Interest cost	0.8	0.8
Transfer in	0.0	0.0
Actuarial (gain) loss	(7.6)	0.4
Benefits paid	(1.7)	(1.8)
Plan amendments	0.0	(1.2)
Settlements paid	0.0	0.0
Projected benefit obligation — ending	19.6	28.1	29.9
Accumulated benefit obligation — ending	19.6	28.1
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	(19.6)	(28.1)	(29.9)
Fair value of plan assets	0.0	0.0	$ 0.0
Funded status	(19.6)	(28.1)
Unrecognized prior service cost (credit)	(0.9)	(1.2)
Unrecognized net loss	(3.8)	3.9
Net amount	(24.3)	(25.4)
Accrued liabilities	(1.5)	(1.6)
Other liabilities	(18.0)	(26.5)
Accumulated other comprehensive (earnings) loss	(4.8)	2.7
Net amount	$ (24.3)	$ (25.4)