Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 25, 2022
Goodwill [Line Items]
Gross value	$ 822.4	$ 811.5
Less accumulated impairment	253.3	253.3
Net	569.1	558.2
US
Goodwill [Line Items]
Gross value	138.8	127.9
Less accumulated impairment	13.8	13.8
Net	125.0	114.1
KGS
Goodwill [Line Items]
Gross value	683.6	683.6
Less accumulated impairment	239.5	239.5
Net	$ 444.1	$ 444.1