v3.24.0.1

Content Assets - Schedule Of Amortization Of Content Assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Capitalized Licensed Content Costs [Abstract] |  |  |
Licensed content | $ 161,633 | $ 216,393 | $ 84,133
Produced content | 46,219 | 17,962 | 11,437
Total amortization costs | $ 207,852 | $ 234,355 | $ 95,570

X
- Definition Amortization expense of content assets. + References No definition available. + Details
Name: | roku_AmortizationExpenseOfContentAssets
Namespace Prefix: | roku_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortization expense of licensed content assets. + References No definition available. + Details
Name: | roku_AmortizationExpenseOfLicensedContentAssets
Namespace Prefix: | roku_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amortization expense of produced content assets. + References No definition available. + Details
Name: | roku_AmortizationExpenseOfProducedContentAssets
Namespace Prefix: | roku_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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