Revenue Recognition - Schedule of Segment Sales Disaggregated by Major Product Line (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 1,004.3	$ 1,011.3	$ 1,949.9	$ 1,975.2
LVC Holdco LLC
Disaggregation of Revenue [Line Items]
Revenue	15.9		31.8
North America
Disaggregation of Revenue [Line Items]
Total Net Sales	816.3	774.0	1,565.2	1,517.4
Rest of World
Disaggregation of Revenue [Line Items]
Total Net Sales	188.0	237.3	384.7	457.8
Operating Segments
Disaggregation of Revenue [Line Items]
Total Net Sales	1,015.4	1,019.1	1,969.5	1,994.5
Operating Segments \| North America
Disaggregation of Revenue [Line Items]
Total Net Sales	820.5	779.0	1,573.9	1,527.7
Operating Segments \| Rest of World
Disaggregation of Revenue [Line Items]
Total Net Sales	194.9	240.1	395.6	466.8
Operating Segments \| Rest of World \| China
Disaggregation of Revenue [Line Items]
Total Net Sales	152.4	192.3	314.8	379.5
Operating Segments \| Rest of World \| All other Rest of World
Disaggregation of Revenue [Line Items]
Total Net Sales	42.5	47.8	80.8	87.3
Operating Segments \| Water heaters and related parts \| North America
Disaggregation of Revenue [Line Items]
Total Net Sales	656.4	644.4	1,268.2	1,269.0
Operating Segments \| Boilers, related parts, and components \| North America
Disaggregation of Revenue [Line Items]
Total Net Sales	101.7	71.2	183.2	135.6
Operating Segments \| Water treatment products and related parts \| North America
Disaggregation of Revenue [Line Items]
Total Net Sales	62.4	63.4	122.5	123.1
Inter-segment sales
Disaggregation of Revenue [Line Items]
Total Net Sales	(11.1)	(7.8)	(19.6)	(19.3)
Inter-segment sales \| North America
Disaggregation of Revenue [Line Items]
Total Net Sales	(4.2)	(5.0)	(8.7)	(10.3)
Inter-segment sales \| Rest of World
Disaggregation of Revenue [Line Items]
Total Net Sales	$ (6.9)	$ (2.8)	$ (10.9)	$ (9.0)