Acquisitions and Divestitures - Narrative (Details) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2018 businesses_acquired businesses_divested	Sep. 30, 2017 businesses_acquired businesses_divested	Sep. 30, 2018 USD ($) businesses_acquired businesses_divested	Sep. 30, 2017 USD ($) businesses_acquired businesses_divested
Business Combinations [Abstract]
Assets held for sale			$ 13.5
Liability held for sale			10.3
Asset Impairment Charges			$ 24.8	$ 0.0
Number of Divestitures \| businesses_divested	0	0	0	0
Number of Businesses Acquired \| businesses_acquired	0	1	1	2

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2420-110228

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration