Goodwill and Intangibles - Goodwill (Details) $ in Millions	6 Months Ended	12 Months Ended	15 Months Ended	18 Months Ended
	Jun. 28, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 29, 2020 USD ($) item	Jun. 28, 2020 USD ($) item
Gross Balance
Balance at the beginning of the period	$ 748.2	$ 711.9	$ 711.9	$ 711.9
Acquired During the Period		38.3
Foreign Currency Translation and Other	(1.0)	(2.0)
Balance at the end of the period	747.2	748.2		747.2
Accumulated Impairment Losses
Balance at the beginning of the period	(167.1)	(167.1)	$ (167.1)	(167.1)
Balance at the end of the period	(167.1)	(167.1)		(167.1)
Net Goodwill	580.1	581.1		$ 580.1
Number of reporting units | item			7	7
Heating and Hot Water Solutions
Gross Balance
Balance at the end of the period	218.9			$ 218.9
Americas
Gross Balance
Balance at the beginning of the period	476.8	438.1	$ 438.1	438.1
Acquired During the Period		38.3
Foreign Currency Translation and Other	(0.4)	0.4
Balance at the end of the period	476.4	476.8		476.4
Accumulated Impairment Losses
Balance at the beginning of the period	(24.5)	(24.5)	(24.5)	(24.5)
Balance at the end of the period	(24.5)	(24.5)		(24.5)
Net Goodwill	451.9	452.3		451.9
Europe
Gross Balance
Balance at the beginning of the period	241.4	243.7	243.7	243.7
Foreign Currency Translation and Other	0.2	(2.3)
Balance at the end of the period	241.6	241.4		241.6
Accumulated Impairment Losses
Balance at the beginning of the period	(129.7)	(129.7)	(129.7)	(129.7)
Balance at the end of the period	(129.7)	(129.7)		(129.7)
Net Goodwill	111.9	111.7		111.9
APMEA
Gross Balance
Balance at the beginning of the period	30.0	30.1	30.1	30.1
Foreign Currency Translation and Other	(0.8)	(0.1)
Balance at the end of the period	29.2	30.0		29.2
Accumulated Impairment Losses
Balance at the beginning of the period	(12.9)	(12.9)	$ (12.9)	(12.9)
Balance at the end of the period	(12.9)	(12.9)		(12.9)
Net Goodwill	$ 16.3	$ 17.1		$ 16.3