Goodwill and Intangibles Goodwill (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 28, 2024	Mar. 30, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Acquisitions				$ 28.2	$ 37.1
Goodwill, Impaired, Accumulated Impairment Loss	$ 0.0		$ 0.0	0.0	0.0	$ 0.0
Goodwill, Other Increase (Decrease)				0.8	2.9
Goodwill	1,059.7		1,007.6	1,059.7	1,007.6	1,030.7	$ 967.6
Amortization Expense for Intangibles	18.2		17.0	54.0
Goodwill, Purchase Accounting Adjustments		$ 4.8
Propulsion [Member]
Goodwill [Roll Forward]
Acquisitions				0.0	37.1
Goodwill, Other Increase (Decrease)				(0.1)	(0.5)
Goodwill	54.0		50.6	54.0	50.6	54.1	14.0
Boat [Member]
Goodwill [Roll Forward]
Acquisitions				28.2	0.0
Goodwill, Other Increase (Decrease)				(1.0)	4.8
Goodwill	171.1		129.8	171.1	129.8	143.9	125.0
Navico Group
Goodwill [Roll Forward]
Acquisitions				0.0	0.0
Goodwill, Other Increase (Decrease)				1.9	(1.3)
Goodwill	601.6		594.5	601.6	594.5	599.7	595.8
Engine Parts and Accessories [Member]
Goodwill [Roll Forward]
Acquisitions				0.0	0.0
Goodwill, Other Increase (Decrease)				0.0	(0.1)
Goodwill	$ 233.0		$ 232.7	$ 233.0	$ 232.7	$ 233.0	$ 232.8
Customer Relationships [Member]
Goodwill [Roll Forward]
Finite-Lived Intangible Asset, Weighted Average Remaining Useful Life				13 years 3 months 18 days
Other Intangible Assets [Member]
Goodwill [Roll Forward]
Finite-Lived Intangible Asset, Weighted Average Remaining Useful Life				11 years 8 months 12 days