Goodwill and Other Intangible Assets, Net - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Roll Forward]
Goodwill , beginning balance	$ 774.7	$ 778.3
Goodwill acquired	91.2
Goodwill, Purchase Accounting Adjustments	(8.2)	3.0
Foreign currency	29.1	(6.6)
Goodwill , ending Balance	886.8	774.7
Industrial Process
Goodwill [Roll Forward]
Goodwill , beginning balance	308.4	312.6
Goodwill acquired	0.0
Goodwill, Purchase Accounting Adjustments	0.0	0.0
Foreign currency	16.1	(4.2)
Goodwill , ending Balance	324.5	308.4
Motion Technologies
Goodwill [Roll Forward]
Goodwill , beginning balance	202.3	201.0
Goodwill acquired	91.2
Goodwill, Purchase Accounting Adjustments	(8.2)	2.6
Foreign currency	10.3	(1.3)
Goodwill , ending Balance	295.6	202.3
Connect & Control Technologies
Goodwill [Roll Forward]
Goodwill , beginning balance	264.0	264.7
Goodwill acquired	0.0
Goodwill, Purchase Accounting Adjustments	0.0	0.4
Foreign currency	2.7	(1.1)
Goodwill , ending Balance	$ 266.7	$ 264.0