Goodwill and Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	Mar. 29, 2026	Dec. 28, 2025
Goodwill [Line Items]
Gross value	$ 1,137.4	$ 849.0
Less accumulated impairment	253.3	253.3
Net	884.1	595.7
KGS
Goodwill [Line Items]
Gross value	998.8	710.4
Less accumulated impairment	239.5	239.5
Net	759.3	470.9
US
Goodwill [Line Items]
Gross value	138.6	138.6
Less accumulated impairment	13.8	13.8
Net	$ 124.8	$ 124.8