Goodwill and Other Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Changes in the carrying amount of goodwill
Gross goodwill, beginning of the period	$ 824.3	$ 872.0
Accumulated impairment, balance at the beginning of the period	(483.9)	(518.5)
Goodwill, balance at the beginning of the period	340.4	353.5
Gross goodwill related to foreign currency translation and other	14.3	(11.6)
Accumulated impairments related to foreign currency translation and other	(8.8)	8.7
Goodwill related to foreign currency translation and other	5.5	(2.9)
Gross goodwill, end of the period	838.6	824.3
Accumulated impairment, balance at the end of the period	(492.7)	(483.9)
Goodwill, balance at the end of the period	345.9	340.4
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Dry Cooling Business
Changes in the carrying amount of goodwill
Gross goodwill, Disposition of Business		(36.1)
Accumulated impairments, Disposition of Business		25.9
Goodwill, Disposition of Business		(10.2)
HVAC segment
Changes in the carrying amount of goodwill
Gross goodwill, beginning of the period	258.5	261.3
Accumulated impairment, balance at the beginning of the period	(144.2)	(145.2)
Goodwill, balance at the beginning of the period	114.3	116.1
Gross goodwill related to foreign currency translation and other	5.2	(2.8)
Accumulated impairments related to foreign currency translation and other	(0.5)	1.0
Goodwill related to foreign currency translation and other	4.7	(1.8)
Gross goodwill, end of the period	263.7	258.5
Accumulated impairment, balance at the end of the period	(144.7)	(144.2)
Goodwill, balance at the end of the period	119.0	114.3
Detection and Measurement segment
Changes in the carrying amount of goodwill
Gross goodwill, beginning of the period	214.4	219.1
Accumulated impairment, balance at the beginning of the period	(134.2)	(138.0)
Goodwill, balance at the beginning of the period	80.2	81.1
Gross goodwill related to foreign currency translation and other	2.2	(4.7)
Accumulated impairments related to foreign currency translation and other	(1.8)	3.8
Goodwill related to foreign currency translation and other	0.4	(0.9)
Gross goodwill, end of the period	216.6	214.4
Accumulated impairment, balance at the end of the period	(136.0)	(134.2)
Goodwill, balance at the end of the period	80.6	80.2
Engineered Solutions segment
Changes in the carrying amount of goodwill
Gross goodwill, beginning of the period	351.4	391.6
Accumulated impairment, balance at the beginning of the period	(205.5)	(235.3)
Goodwill, balance at the beginning of the period	145.9	156.3
Gross goodwill related to foreign currency translation and other	6.9	(4.1)
Accumulated impairments related to foreign currency translation and other	(6.5)	3.9
Goodwill related to foreign currency translation and other	0.4	(0.2)
Gross goodwill, end of the period	358.3	351.4
Accumulated impairment, balance at the end of the period	(212.0)	(205.5)
Goodwill, balance at the end of the period	$ 146.3	145.9
Engineered Solutions segment | Disposal Group, Disposed of by Sale, Not Discontinued Operations | Dry Cooling Business
Changes in the carrying amount of goodwill
Gross goodwill, Disposition of Business		(36.1)
Accumulated impairments, Disposition of Business		25.9
Goodwill, Disposition of Business		$ (10.2)