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Long-Term Debt First Lien Leverage Ratio (Details)	Sep. 15, 2016
Line of Credit Facility [Line Items]
Line of Credit Facility, Covenant Terms, Maximum First Lien Leverage Ratio Allowed	4.25
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Covenant Terms, Maximum First Lien Leverage Ratio Allowed	1.00

X

- Definition

line of credit facility, covenant terms, maximum First Lien Leverage Ratio Allowed

+ References

No definition available.

+ Details

Name:	byd_LineofCreditFacilityCovenantTermsMaximumFirstLienLeverageRatioAllowed
Namespace Prefix:	byd_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

X

- 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_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_DebtInstrumentAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: