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Goodwill and Intangible Assets - Narratives (Details) $ in Millions |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jul. 01, 2019 segment | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($)
Finite-Lived Intangible Assets |  |  |  |  |
Number of reportable segments | 4 |  |  |  |
Amortization expense | $ |  | $ 13.8 | $ 5.0 | $ 28.3 | $ 15.7
Government grants | Minimum |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |
Finite lived intangible assets useful life |  |  |  | 10 years |
Government grants | Maximum |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |
Finite lived intangible assets useful life |  |  |  | 50 years |
Previously Reported |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |
Number of reportable segments | 3 |  |  |  |
Adjustment |  |  |  |  |
Finite-Lived Intangible Assets |  |  |  |  |
Number of reportable segments | 2 |  |  |  |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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