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Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($)
Number of Gaming Entertainment Properties | 28 |
Taxes, Other | $ 126.7 | $ 130.1
Taxes Deposited Pursuant to the Online Collaborative Agreements | 2.5 | 0.6
Online [Member] |  |
Taxes Deposited Pursuant to the Online Collaborative Agreements | $ 116.0 | $ 96.0

X
- Definition The number of gaming entertainment properties. + References No definition available. + Details
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Period Type: | instant

X
- Definition Amount of tax expense classified as taxes deposited pursuant to the online collaborative agreements. + References No definition available. + Details
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Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of tax expense classified as other. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |