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Commitments and Contingencies Contingent Payments (Details) | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($)
Other Commitments [Line Items] |
Payment to option holder, percentage of EBITDA | 1.00%
Diamond Jo Worth |
Other Commitments [Line Items] |
Parking Spaces | $ 65

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- Definition Business Combination, Contingent Consideration Arrangements, Payment to Option Holder, Percentage of EBITDA + References No definition available. + Details
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Namespace Prefix: | byd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Parking Spaces + References No definition available. + Details
Name: | byd_ParkingSpaces
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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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. + References No definition available. + Details
Name: | us-gaap_OtherCommitmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=byd_DiamondJoWorthMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |