Goodwill and Other Intangible Assets (Schedule of Goodwill) (Details) $ in Millions	3 Months Ended
Mar. 31, 2018 USD ($)
Goodwill
Goodwill at beginning of period	$ 1,541.4
Adjustment	1.9
Foreign currency translation	20.5
Goodwill at end of period	1,563.8
North America
Goodwill
Goodwill at beginning of period	611.1
Adjustment	0.0
Foreign currency translation	0.0
Goodwill at end of period	611.1
South America
Goodwill
Goodwill at beginning of period	136.4
Adjustment	0.0
Foreign currency translation	(0.4)
Goodwill at end of period	136.0
EME
Goodwill
Goodwill at beginning of period	671.0
Adjustment	1.9
Foreign currency translation	17.2
Goodwill at end of period	690.1
APA
Goodwill
Goodwill at beginning of period	122.9
Adjustment	0.0
Foreign currency translation	3.7
Goodwill at end of period	$ 126.6

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

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