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Goodwill and Intangible Assets - Narratives (Details) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jul. 01, 2019 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jun. 30, 2020
Finite-lived and Indefinite-lived Intangible Assets |  |  |  |  |
Intangible assets amortization expense |  | $ 45.7 | $ 39.8 | $ 21.9 |
AXC |  |  |  |  |
Finite-lived and Indefinite-lived Intangible Assets |  |  |  |  |
Intangible assets amortization expense |  |  | 16.8 |  |
AXC | Trademarks and trade names |  |  |  |  |
Finite-lived and Indefinite-lived Intangible Assets |  |  |  |  |
Impairment of intangible asset |  | 16.0 |  |  |
Indefinite lived intangible asset |  | $ 39.0 | $ 55.0 |  | $ 55.0
Minimum |  |  |  |  |
Finite-lived and Indefinite-lived Intangible Assets |  |  |  |  |
Finite lived intangible asset useful life |  | 2 years |  |  |
Minimum | AXC |  |  |  |  |
Finite-lived and Indefinite-lived Intangible Assets |  |  |  |  |
Finite lived intangible asset useful life | 1 year |  |  |  |
Maximum |  |  |  |  |
Finite-lived and Indefinite-lived Intangible Assets |  |  |  |  |
Finite lived intangible asset useful life |  | 15 years |  |  |
Maximum | AXC |  |  |  |  |
Finite-lived and Indefinite-lived Intangible Assets |  |  |  |  |
Finite lived intangible asset useful life | 14 years |  |  |  |
Government grants | Minimum |  |  |  |  |
Finite-lived and Indefinite-lived Intangible Assets |  |  |  |  |
Finite lived intangible asset useful life |  | 10 years |  |  |
Government grants | Maximum |  |  |  |  |
Finite-lived and Indefinite-lived Intangible Assets |  |  |  |  |
Finite lived intangible asset useful life |  | 50 years |  |  |

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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=121586364&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 Amount of assets, excluding financial assets and goodwill, that lack physical substance, having a projected indefinite period of benefit, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121647850&loc=d3e4845-128472 + 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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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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