XML 123 R104.htm IDEA: XBRL DOCUMENT v3.10.0.1

Fair Value Measurements (Valuation Techniques) (Details)	12 Months Ended
	Dec. 31, 2017
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage	9.20%

X

- Definition

Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage

+ References

No definition available.

+ Details

Name:	byd_FairValueMeasurementsRecurringAndNonrecurringValuationTechniquesUnobservableInputsRatePercentage
Namespace Prefix:	byd_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

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