Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Intangible Asset, Finite-Lived [Line Items] | ||||
| Total amortization expense | $ 1.8 | $ 0.0 | $ 3.2 | $ 0.0 |
| Operating rights | ||||
| Intangible Asset, Finite-Lived [Line Items] | ||||
| Total amortization expense | 0.9 | $ 0.0 | 1.2 | $ 0.0 |
| Location, Statement of Income, Balance [Axis]: us-gaap:CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization | Operating rights | ||||
| Intangible Asset, Finite-Lived [Line Items] | ||||
| Total amortization expense | 0.6 | 0.6 | ||
| Location, Statement of Income, Balance [Axis]: achr:GeneralAndAdministrativeExpenseCredit | Operating rights | ||||
| Intangible Asset, Finite-Lived [Line Items] | ||||
| Total amortization expense | $ 0.3 | $ 0.6 | ||
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- Definition Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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