Accumulated Other Comprehensive Loss - Changes in OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2024	Dec. 29, 2023	Dec. 30, 2022
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, value	$ 1,912.7
Balance, value	2,006.8	$ 1,912.7
Net unrealized foreign currency translation gain (loss)	(8.1)	(3.5)	$ (18.6)
Cash Flow Hedges
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, value	3.8	6.0
Other comprehensive income (loss) before reclassifications	9.0	8.8
Amounts reclassified from accumulated other comprehensive loss	(7.2)	(11.0)
Net current period other comprehensive income (loss)	1.8	(2.2)
Balance, value	5.6	3.8	6.0
Tax on other comprehensive income (loss) before reclassifications	0.2	1.7
Foreign Currency Translation Adjustment
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, value	(37.1)	(36.0)
Other comprehensive income (loss) before reclassifications	(8.1)	(3.5)
Amounts reclassified from accumulated other comprehensive loss	0.0	2.4
Net current period other comprehensive income (loss)	(8.1)	(1.1)
Balance, value	(45.2)	(37.1)	(36.0)
Net unrealized foreign currency translation gain (loss)	(6.1)	1.0
Retirement Benefit Adjustment
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, value	(10.0)	(11.5)
Other comprehensive income (loss) before reclassifications	(1.6)	0.9
Amounts reclassified from accumulated other comprehensive loss	0.8	0.6
Net current period other comprehensive income (loss)	(0.8)	1.5
Balance, value	(10.8)	(10.0)	(11.5)
Accumulated Other Comprehensive Loss
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, value	(43.3)	(41.5)	(66.9)
Other comprehensive income (loss) before reclassifications	(0.7)	6.2
Amounts reclassified from accumulated other comprehensive loss	(6.4)	(8.0)
Net current period other comprehensive income (loss)	(7.1)	(1.8)
Balance, value	$ (50.4)	$ (43.3)	$ (41.5)