Accumulated Other Comprehensive Loss - Changes in OCI (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2025	Dec. 27, 2024	Dec. 29, 2023
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, value	$ 2,006.8
Balance, value	2,030.2	$ 2,006.8
Net unrealized foreign currency translation gain (loss)	20.4	(8.1)	$ (3.5)
Foreign Currency Translation Adjustment
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, value	(45.2)	(37.1)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	20.4	(8.1)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0.0	0.0
Net current period other comprehensive income (loss)	20.4	(8.1)
Balance, value	(24.8)	(45.2)	(37.1)
Net unrealized foreign currency translation gain (loss)	(10.1)	6.1
Retirement Benefit Adjustment
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, value	(10.8)	(10.0)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(5.5)	(1.6)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1.0	0.8
Net current period other comprehensive income (loss)	(4.5)	(0.8)
Balance, value	(15.3)	(10.8)	(10.0)
Accumulated Other Comprehensive Loss
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, value	(50.4)	(43.3)	(41.5)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	3.6	(0.7)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	8.6	(6.4)
Net current period other comprehensive income (loss)	12.2	(7.1)
Balance, value	(38.2)	(50.4)	(43.3)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Changes in Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance, value	5.6	3.8
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(11.3)	9.0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	7.6	(7.2)
Net current period other comprehensive income (loss)	(3.7)	1.8
Balance, value	$ 1.9	5.6	$ 3.8
Tax on other comprehensive income (loss) before reclassifications		$ 0.2