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Revenue Recognition - Impact of Adoption of Topic 606 (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Net sales | $ 269.4 | $ 248.7 | $ 810.1 | $ 650.9
Cost of sales | 200.4 | 187.4 | 600.0 | 491.3
Gross profit | 69.0 | 61.3 | 210.1 | 159.6
Balances Without Adoption of Topic 606 |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Net sales | 272.9 |  | 821.1 |
Cost of sales | 203.9 |  | 611.0 |
Gross profit | 69.0 |  | 210.1 |
Effect of Change |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Net sales | (3.5) |  | (11.0) |
Cost of sales | (3.5) |  | (11.0) |
Gross profit | 0.0 |  | $ 0.0 |
Environmental Solutions |  |  |  |
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |  |  |  |
Percent change in net sales due to adoption of Topic 606 |  |  | (1.00%) |
Net sales | $ 216.3 | $ 198.5 | $ 646.2 | $ 500.6

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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