Segments - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 1,206.5	$ 1,088.5	$ 2,372.3	$ 2,096.3
Equity in earnings in unconsolidated affiliates	0.4	0.2	0.4	0.4
Adjusted EBITDA	247.6	227.2	467.6	430.3
Investment in unconsolidated affiliates	16.2	14.8	16.2	14.8
Performance Coatings [Member]
Segment Reporting Information [Line Items]
Net sales	784.5	662.9	1,513.2	1,249.3
Equity in earnings in unconsolidated affiliates	0.0	0.1	0.1	0.2
Adjusted EBITDA	176.5	146.8	319.7	263.7
Investment in unconsolidated affiliates	3.0	3.0	3.0	3.0
Transportation Coatings [Member]
Segment Reporting Information [Line Items]
Net sales	422.0	425.6	859.1	847.0
Equity in earnings in unconsolidated affiliates	0.4	0.1	0.3	0.2
Adjusted EBITDA	71.1	80.4	147.9	166.6
Investment in unconsolidated affiliates	$ 13.2	$ 11.8	$ 13.2	$ 11.8

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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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(10))
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
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-Name Accounting Standards Codification
-Topic 942
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-Section S99
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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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