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Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Intangible Assets | The following table summarizes the components of gross intangible asset, accumulated amortization, and net intangible asset balances as of December 31, 2017, and 2016 (in millions):
|  | December 31, 2017 |  | December 31, 2016
|  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Patents and developed technology |  | $ | 156.0 |  |  | $ | (140.2 | ) |  | $ | 15.8 |  |  | $ | 158.7 |  |  | $ | (141.6 | ) |  | $ | 17.1 |
Distribution rights and others |  | 9.2 |  |  | (9.2 | ) |  | — |  |  | 9.2 |  |  | (9.1 | ) |  | 0.1 |
Customer relationships |  | 28.6 |  |  | (18.4 | ) |  | 10.2 |  |  | 28.6 |  |  | (14.3 | ) |  | 14.3 |
Total intangible assets |  | $ | 193.8 |  |  | $ | (167.8 | ) |  | $ | 26.0 |  |  | $ | 196.5 |  |  | $ | (165.0 | ) |  | $ | 31.5 |
Schedule Of Estimated Future Amortization Expense Of Intangible Assets | The estimated future amortization expense related to intangible assets as of December 31, 2017, is as follows (in millions):
Fiscal Year | Amount
2018 | $ | 9.6 |
2019 | 4.6 |
2020 | 4.6 |
2021 | 3.4 |
2022 | 2.1 |
2023 and thereafter | 1.7 |
Total | $ | 26.0 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + 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) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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- Definition Tabular disclosure of the amount of amortization expense expected to be recorded in succeeding fiscal years for finite-lived intangible assets. + 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) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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