Goodwill and Intangibles Finite-Lived Intangibles (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 26, 2020 |
Sep. 28, 2019 |
Sep. 26, 2020 |
Sep. 28, 2019 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Finite-Lived Intangible Assets [Line Items] | ||||||||||||||||||
| Goodwill | $ 416.3 | $ 414.0 | $ 416.3 | $ 414.0 | $ 415.0 | $ 377.3 | ||||||||||||
| Acquisitions | 0.0 | 26.0 | ||||||||||||||||
| Goodwill, Other Increase (Decrease) | 1.3 | 10.7 | ||||||||||||||||
| Gross Amount | 871.2 | 870.4 | 871.2 | 870.4 | 871.2 | |||||||||||||
| Accumulated Amortization | (311.6) | (279.4) | (311.6) | (279.4) | (287.7) | |||||||||||||
| Amortization Expense for Intangibles | 8.0 | 8.0 | 24.0 | 23.7 | ||||||||||||||
| Trade Names [Member] | ||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||||||||||||||
| Gross Amount | 165.8 | 165.6 | 165.8 | 165.6 | 165.8 | |||||||||||||
| Accumulated Amortization | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | |||||||||||||
| Customer Relationships [Member] | ||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||||||||||||||
| Gross Amount | 687.0 | [1] | 686.5 | 687.0 | [1] | 686.5 | 687.0 | |||||||||||
| Accumulated Amortization | (298.2) | [1] | (266.5) | (298.2) | [1] | (266.5) | (274.6) | |||||||||||
| Other Intangible Assets [Member] | ||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||||||||||||||
| Gross Amount | 18.4 | [1] | 18.3 | 18.4 | [1] | 18.3 | 18.4 | |||||||||||
| Accumulated Amortization | (13.4) | [1] | (12.9) | (13.4) | [1] | (12.9) | (13.1) | |||||||||||
| Propulsion [Member] | ||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||||||||||||||
| Goodwill | 14.5 | [2] | 14.1 | [3] | 14.5 | [2] | 14.1 | [3] | 14.5 | [2] | 14.6 | [3] | ||||||
| Acquisitions | 0.0 | [2] | 0.0 | [3] | ||||||||||||||
| Goodwill, Other Increase (Decrease) | 0.0 | [2] | (0.5) | [3] | ||||||||||||||
| Gross Amount | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | |||||||||||||
| Accumulated Amortization | (0.5) | (0.5) | (0.5) | (0.5) | (0.5) | |||||||||||||
| Parts and Accessories [Member] | ||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||||||||||||||
| Goodwill | 371.9 | [2] | 371.4 | [3] | 371.9 | [2] | 371.4 | [3] | 371.9 | [2] | 360.5 | [3] | ||||||
| Acquisitions | 0.0 | [2] | 0.0 | [3] | ||||||||||||||
| Goodwill, Other Increase (Decrease) | 0.0 | [2] | 10.9 | [3] | ||||||||||||||
| Gross Amount | 617.6 | 616.9 | 617.6 | 616.9 | 617.6 | |||||||||||||
| Accumulated Amortization | (104.5) | (74.1) | (104.5) | (74.1) | (81.9) | |||||||||||||
| Boat [Member] | ||||||||||||||||||
| Finite-Lived Intangible Assets [Line Items] | ||||||||||||||||||
| Goodwill | 29.9 | 28.5 | 29.9 | 28.5 | 28.6 | $ 2.2 | ||||||||||||
| Acquisitions | 0.0 | 26.0 | ||||||||||||||||
| Goodwill, Other Increase (Decrease) | 1.3 | 0.3 | ||||||||||||||||
| Gross Amount | 252.6 | 252.5 | 252.6 | 252.5 | 252.6 | |||||||||||||
| Accumulated Amortization | $ (206.6) | $ (204.8) | $ (206.6) | $ (204.8) | $ (205.3) | |||||||||||||
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