Acquisitions and Discontinued Operations - Results of Operations (Details) - USD ($) $ in Millions	3 Months Ended								9 Months Ended	12 Months Ended
	Dec. 31, 2021	Oct. 02, 2021	Jul. 03, 2021	Apr. 03, 2021	Dec. 31, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Oct. 01, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Discontinued Operations
Gain (loss) from discontinued operations, net of tax	$ 2.0	$ 316.4	$ 44.2	$ 3.8	$ 5.3	$ 3.1	$ 8.2	$ 8.6		$ 366.4	$ 25.2	$ (11.0)
Income tax benefit										10.9	4.8	12.5
Discontinued operations
Discontinued Operations
Income (loss) from discontinued operations										409.2	35.8	(9.5)
Income tax (provision) benefit			$ (33.0)							(42.8)	(10.6)	(1.5)
Gain (loss) from discontinued operations, net of tax										366.4	25.2	(11.0)
Transformer Solutions
Discontinued Operations
Income tax benefit	16.5
Transformer Solutions | Discontinued operations
Discontinued Operations
Income tax benefit	$ 27.4
Transformer Solutions | Discontinued operations
Discontinued Operations
Income (loss) from discontinued operations									$ 27.9	454.9	56.9	39.4
Income tax (provision) benefit									(7.0)	(51.8)	(14.0)	(8.8)
Gain (loss) from discontinued operations, net of tax									$ 20.9	403.1	42.9	30.6
DBT | Discontinued operations
Discontinued Operations
Income (loss) from discontinued operations										(37.8)	(16.6)	(43.1)
Income tax (provision) benefit										2.7	2.4	7.3
Gain (loss) from discontinued operations, net of tax										(35.1)	(14.2)	(35.8)
Heat Transfer | Discontinued operations
Discontinued Operations
Income (loss) from discontinued operations										(0.3)	0.3	(1.8)
Income tax (provision) benefit										0.0	(0.1)	0.4
Gain (loss) from discontinued operations, net of tax										(0.3)	0.2	(1.4)
All other | Discontinued operations
Discontinued Operations
Income (loss) from discontinued operations										(7.6)	(4.8)	(4.0)
Income tax (provision) benefit										6.3	1.1	(0.4)
Gain (loss) from discontinued operations, net of tax										$ (1.3)	$ (3.7)	$ (4.4)