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Goodwill and Other Intangible Assets - Schedule of Activity in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 30, 2023 | Dec. 28, 2024 | Dec. 30, 2023
Goodwill [Roll Forward] |  |  |
Goodwill, gross beginning balance |  | $ 519.6 | $ 371.1
Accumulated impairment losses, beginning balance |  | (78.6) | (65.2)
Goodwill, net beginning balance |  | 441.0 | 305.9
Goodwill acquired / measurement period adjustments |  | 1.1 |
Impairment losses |  |  | (27.6)
Goodwill disposed |  |  | (14.1)
Accumulated impairment losses disposed |  |  | 14.1
Goodwill, gross ending balance | $ 519.6 | 520.7 | 519.6
Accumulated impairment losses, ending balance | (78.6) | (78.6) | (78.6)
Goodwill, net ending balance | 441.0 | 442.1 | 441.0
Goodwill acquired / measurement period adjustments |  |  | 162.7
Workplace Furnishings |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, gross beginning balance |  | 297.2 | 148.7
Accumulated impairment losses, beginning balance |  | (78.5) | (65.0)
Goodwill, net beginning balance |  | 218.7 | 83.6
Goodwill acquired / measurement period adjustments |  | 1.1 |
Impairment losses | (27.6) |  | (27.6)
Goodwill disposed |  |  | (14.1)
Accumulated impairment losses disposed |  |  | 14.1
Goodwill, gross ending balance | 297.2 | 298.3 | 297.2
Accumulated impairment losses, ending balance | (78.5) | (78.5) | (78.5)
Goodwill, net ending balance | 218.7 | 219.8 | 218.7
Goodwill acquired / measurement period adjustments |  |  | 162.7
Residential Building Products |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill, gross beginning balance |  | 222.4 | 222.4
Accumulated impairment losses, beginning balance |  | (0.1) | (0.1)
Goodwill, net beginning balance |  | 222.3 | 222.3
Goodwill acquired / measurement period adjustments |  | 0.0 |
Impairment losses |  |  | 0.0
Goodwill disposed |  |  | 0.0
Accumulated impairment losses disposed |  |  | 0.0
Goodwill, gross ending balance | 222.4 | 222.4 | 222.4
Accumulated impairment losses, ending balance | (0.1) | (0.1) | (0.1)
Goodwill, net ending balance | $ 222.3 | $ 222.3 | 222.3
Goodwill acquired / measurement period adjustments |  |  | $ 0.0

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