Segment Data (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 27, 2025	Sep. 28, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Net Sales	$ 1,360.2	$ 1,273.3	$ 4,029.0	$ 4,082.2
Operating Income (Loss)	(242.2)	98.4	(82.6)	367.3
Cost of sales, including restructuring	1,018.0	945.2	3,016.0	2,999.4
Operating Expenses	584.4	229.7	1,095.6	715.5
Total Assets	5,413.5	6,023.5	5,413.5	6,023.5	$ 5,677.7
Depreciation	54.0	54.0	157.9	158.0
Amortization	19.7	18.2	59.0	54.0
Payments to Acquire Property, Plant, and Equipment	33.9	36.0	116.5	137.1
Research and Development Expense	43.4	41.7	123.7	130.5
Net Property	1,217.7	1,278.3	1,217.7	1,278.3	1,251.5
Selling, General and Administrative Expense	215.8	180.7	640.4	566.2
Restructuring, Exit and Impairment Charges	333.8	12.2	342.9	33.6
Revenue from Contract with Customer, Excluding Assessed Tax	1,360.2	1,273.3	4,029.0	4,082.2
United States [Member]
Segment Reporting Information [Line Items]
Net Sales	925.5	868.1	2,720.0	2,760.0
Net Property	1,094.2	1,149.0	1,094.2	1,149.0	1,127.8
Revenue from Contract with Customer, Excluding Assessed Tax	1,001.3	940.5	2,968.5	3,015.0
Non-US
Segment Reporting Information [Line Items]
Net Sales	434.7	405.2	1,309.0	1,322.2
Net Property	108.0	109.1	108.0	109.1	105.2
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Net Property	15.5	20.2	15.5	20.2	18.5
Cost of Sales [Member]
Segment Reporting Information [Line Items]
Restructuring, Exit and Impairment Charges	8.6	4.8	11.4	14.7
Selling, General and Administrative Expenses [Member]
Segment Reporting Information [Line Items]
Restructuring, Exit and Impairment Charges	325.2	7.4	331.5	18.9
Segment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(86.0)	(78.1)	(283.7)	(284.8)
Propulsion [Member]
Segment Reporting Information [Line Items]
Net Sales	472.2	427.1	1,410.7	1,409.4
Operating Income (Loss)	45.1	50.1	157.0	218.5
Cost of sales, including restructuring	359.0	316.4	1,058.3	997.9
Operating Expenses	68.1	60.6	195.4	193.0
Total Assets	1,413.4	1,654.5	1,413.4	1,654.5	1,507.3
Depreciation	31.0	32.4	91.6	94.8
Amortization	1.9	1.7	5.9	4.8
Segment, Expenditure, Addition to Long-Lived Assets	19.2	16.0	55.8	67.1
Research and Development Expense	22.7	20.8	62.6	66.0
Restructuring, Exit and Impairment Charges	0.0	2.9	1.2	8.9
Revenue from Contract with Customer, Excluding Assessed Tax	472.0	427.1	1,410.7	1,409.4
Propulsion [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	342.6	308.1	1,017.2	1,037.4
Propulsion [Member] | Segment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(63.4)	(58.8)	(209.9)	(212.7)
Boat [Member]
Segment Reporting Information [Line Items]
Net Sales	359.8	345.3	1,137.1	1,205.2
Operating Income (Loss)	(3.3)	(0.1)	15.5	54.1
Cost of sales, including restructuring	307.0	295.3	954.2	997.8
Operating Expenses	56.1	50.1	167.4	153.3
Total Assets	896.9	917.5	896.9	917.5	868.3
Depreciation	14.7	13.5	41.6	39.0
Amortization	1.5	1.4	4.5	4.2
Segment, Expenditure, Addition to Long-Lived Assets	6.8	9.8	36.1	39.6
Research and Development Expense	7.4	5.9	22.1	18.8
Restructuring, Exit and Impairment Charges	8.4	2.9	9.7	5.6
Revenue from Contract with Customer, Excluding Assessed Tax	360.0	345.3	1,137.1	1,205.2
Boat [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	292.4	290.2	918.7	961.4
Boat [Member] | Segment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(0.2)	0.0	(0.8)	0.0
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	0.0	0.0	0.0	0.0
Operating Income (Loss)	(37.5)	(29.2)	(109.0)	(86.3)
Cost of sales, including restructuring	0.0	0.0	0.0	0.0
Operating Expenses	37.5	29.2	109.0	86.3
Total Assets	684.3	602.4	684.3	602.4	621.0
Depreciation	1.2	1.2	3.6	3.7
Amortization	1.1	0.8	3.3	2.4
Segment, Expenditure, Addition to Long-Lived Assets	1.3	1.4	4.4	6.2
Research and Development Expense	1.0	2.2	3.0	6.9
Restructuring, Exit and Impairment Charges	0.2	1.1	0.5	2.3
Engine Parts and Accessories [Member]
Segment Reporting Information [Line Items]
Net Sales	361.9	334.7	950.7	929.5
Operating Income (Loss)	82.4	86.3	193.2	195.1
Cost of sales, including restructuring	248.5	221.8	666.8	651.9
Operating Expenses	31.0	26.6	90.7	82.5
Total Assets	877.2	849.3	877.2	849.3	803.5
Depreciation	4.1	3.8	12.2	11.3
Amortization	0.2	0.3	0.7	0.7
Segment, Expenditure, Addition to Long-Lived Assets	3.5	2.2	9.7	8.0
Research and Development Expense	0.3	0.2	1.0	0.9
Restructuring, Exit and Impairment Charges	0.0	0.8	0.4	4.3
Revenue from Contract with Customer, Excluding Assessed Tax	361.9	334.7	950.7	929.5
Engine Parts and Accessories [Member] | United States [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	257.7	235.9	685.1	660.9
Engine Parts and Accessories [Member] | Segment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	(1.8)	(1.4)	(6.1)	(5.1)
Navico Group
Segment Reporting Information [Line Items]
Net Sales	166.3	166.2	530.5	538.1
Operating Income (Loss)	(328.9)	(8.7)	(339.3)	(14.1)
Cost of sales, including restructuring	103.5	111.7	336.7	351.8
Operating Expenses	391.7	63.2	533.1	200.4
Total Assets	1,541.7	1,999.8	1,541.7	1,999.8	$ 1,877.6
Depreciation	3.0	3.1	8.9	9.2
Amortization	15.0	14.0	44.6	41.9
Segment, Expenditure, Addition to Long-Lived Assets	3.1	6.6	10.5	16.2
Research and Development Expense	12.0	12.6	35.0	37.9
Restructuring, Exit and Impairment Charges	324.3	4.5	330.2	12.5
Revenue from Contract with Customer, Excluding Assessed Tax	166.3	166.2	530.5	538.1
Navico Group | United States [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	108.6	106.3	347.5	355.3
Navico Group | Segment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ (20.6)	$ (17.9)	$ (66.9)	$ (67.0)