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Balance Sheet Details - Narrative (Details) - USD ($) $ in Millions | 11 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Maximum contractual maturities of debt securities held | 12 months | 12 months |  |
Depreciation expense |  | $ 46.9 | $ 28.6 | $ 16.1
Gain (loss) on disposal of machinery and equipment |  | (10.5) | (5.4) | $ (11.0)
Restructuring charges and costs | $ 8.0 |  |  |
Receiver Product Component |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Inventory write-down |  | $ 14.1 | $ 7.3 |

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- Definition Period between issuance and maturity of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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