v3.24.0.1

Content Assets - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Capitalized Licensed Content Costs [Abstract] |  |  |
Content asset impairment charges | $ 65.5 | $ 0.0 | $ 0.0

X
- Definition Capitalized licensed content costs. + References No definition available. + Details
Name: | roku_CapitalizedLicensedContentCostsAbstract
Namespace Prefix: | roku_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Content Asset Impairment Charges + References No definition available. + Details
Name: | roku_ContentAssetImpairmentCharges
Namespace Prefix: | roku_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration