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Business Combinations - VCT Vogel GmbH (Details) € in Millions, $ in Millions			9 Months Ended
	Aug. 31, 2017 USD ($)	Aug. 31, 2017 EUR (€)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)
Business Acquisition
Payment for acquisition of businesses, net of cash acquired			$ 12.5	$ 446.0
VCT Vogel GmbH
Business Acquisition
Voting percentage acquired	100.00%	100.00%
Payment for acquisition of businesses, net of cash acquired	$ 4.2	€ 3.6

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

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