XML 40 R27.htm IDEA: XBRL DOCUMENT
v3.21.2

Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($)
Number of Gaming Entertainment Properties, Open and Operating | 27 |  | 27 |
Number of Gaming Entertainment Properties | 28 |  | 28 |
Taxes, Other | $ 162.2 | $ 114.8 | $ 498.6 | $ 259.7

X
- Definition The number of gaming entertainment properties. + References No definition available. + Details
Name: | byd_NumberOfGamingEntertainmentProperties
Namespace Prefix: | byd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents number of gaming entertainment properties open and operating. + References No definition available. + Details
Name: | byd_NumberOfGamingEntertainmentPropertiesOpenAndOperating
Namespace Prefix: | byd_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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