Segments - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 1,139.3	$ 1,091.8	$ 3,511.6	$ 3,188.1
Equity in earnings in unconsolidated affiliates	0.2	0.1	0.6	0.5
Adjusted EBITDA	234.7	209.5	702.3	639.8
Investment in unconsolidated affiliates	16.7	15.4	16.7	15.4
Performance Coatings [Member]
Segment Reporting Information [Line Items]
Net sales	755.0	693.5	2,268.2	1,942.8
Equity in earnings in unconsolidated affiliates	0.2	0.0	0.3	0.2
Adjusted EBITDA	176.4	135.1	496.1	398.8
Investment in unconsolidated affiliates	3.4	3.1	3.4	3.1
Transportation Coatings [Member]
Segment Reporting Information [Line Items]
Net sales	384.3	398.3	1,243.4	1,245.3
Equity in earnings in unconsolidated affiliates	0.0	0.1	0.3	0.3
Adjusted EBITDA	58.3	74.4	206.2	241.0
Investment in unconsolidated affiliates	$ 13.3	$ 12.3	$ 13.3	$ 12.3

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570

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-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(12))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
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-Publisher FASB
-Name Accounting Standards Codification
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-Section 45
-Paragraph 28
-Subparagraph (b)
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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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