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Goodwill and Other Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Intangible assets with determinable lives |  |  |
Gross carrying value of finite-lived intangible assets | $ 19.7 | $ 20.7 |
Accumulated amortization | (14.3) | (13.7) |
Net carrying value of finite-lived intangible assets | 5.4 | 7.0 |
Gross carrying value | 131.9 | 131.6 |
Net carrying value | 117.6 | 117.9 |
Intangible assets with indefinite lives |  |  |
Amortization expense | 0.6 | 2.8 | $ 5.2
Estimated amortization expense related to intangible assets |  |  |
2018 | 0.6 |  |
2019 | 0.6 |  |
2020 | 0.6 |  |
2021 | 0.6 |  |
2022 | 0.6 |  |
Trademarks |  |  |
Intangible assets with indefinite lives |  |  |
Trademarks | 112.2 | 110.9 |
Customer relationships |  |  |
Intangible assets with determinable lives |  |  |
Gross carrying value of finite-lived intangible assets | 1.4 | 1.4 |
Accumulated amortization | (1.4) | (1.4) |
Net carrying value of finite-lived intangible assets | 0.0 | 0.0 |
Technology |  |  |
Intangible assets with determinable lives |  |  |
Gross carrying value of finite-lived intangible assets | 2.1 | 2.1 |
Accumulated amortization | (0.5) | (0.4) |
Net carrying value of finite-lived intangible assets | 1.6 | 1.7 |
Patents |  |  |
Intangible assets with determinable lives |  |  |
Gross carrying value of finite-lived intangible assets | 4.5 | 4.5 |
Accumulated amortization | (4.5) | (4.5) |
Net carrying value of finite-lived intangible assets | 0.0 | 0.0 |
Other |  |  |
Intangible assets with determinable lives |  |  |
Gross carrying value of finite-lived intangible assets | 11.7 | 12.7 |
Accumulated amortization | (7.9) | (7.4) |
Net carrying value of finite-lived intangible assets | $ 3.8 | $ 5.3 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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