Goodwill and Intangible Assets Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill [Line Items]
Goodwill Beginning	$ 218.0	$ 218.4
Foreign currency translation adjustments and other	(2.5)	0.4
Goodwill, Acquired During Period	248.3
Goodwill Ending	468.8	218.0
Goodwill, Impaired, Accumulated Impairment Loss	195.8	195.8
Energy & Chemicals [Member]
Goodwill [Line Items]
Goodwill Beginning	27.9	27.9
Foreign currency translation adjustments and other	(0.1)	0.0
Goodwill, Acquired During Period	247.1
Goodwill Ending	275.1	27.9
Goodwill, Impaired, Accumulated Impairment Loss	64.6	64.6
Distribution & Storage [Member]
Goodwill [Line Items]
Goodwill Beginning	165.5	165.9
Foreign currency translation adjustments and other	(2.5)	0.4
Goodwill, Acquired During Period	1.2
Goodwill Ending	169.2	165.5
Goodwill, Impaired, Accumulated Impairment Loss	0.0	0.0
BioMedical [Member]
Goodwill [Line Items]
Goodwill Beginning	24.6	24.6
Foreign currency translation adjustments and other	0.1	0.0
Goodwill, Acquired During Period	0.0
Goodwill Ending	24.5	24.6
Goodwill, Impaired, Accumulated Impairment Loss	$ 131.2	$ 131.2