Retirement Benefits (Details 6) - USD ($) $ in Millions	Dec. 29, 2024	Dec. 31, 2023
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Current assets	$ 0.0	$ 2.4
Noncurrent assets	16.6	33.6
Current liabilities	(5.2)	(5.6)
Noncurrent liabilities	(37.2)	(39.7)
Total amount recognized	(25.8)	(9.3)
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Current assets	0.0	0.0
Noncurrent assets	0.0	0.0
Current liabilities	(24.9)	(26.4)
Noncurrent liabilities	(164.3)	(175.2)
Total amount recognized	$ (189.2)	$ (201.6)