XML 127 R107.htm IDEA: XBRL DOCUMENT v3.3.1.900

Fair Value Measurements (Valuation Techniques) (Details) - Discount Rate [Member] - Fair Value, Measurements, Recurring - Fair Value, Inputs, Level 3 [Member]	12 Months Ended
	Dec. 31, 2015
Contingent Payments
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage	18.50%
Available-for-sale Securities [Member]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items]
Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques, Unobservable Inputs, Rate, Percentage	10.00%

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

X

- Details

Name:	us-gaap_ValuationTechniqueAxis=byd_DiscountRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsRecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByLiabilityClassAxis=byd_ContingentConsiderationLiabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByAssetClassAxis=us-gaap_AvailableforsaleSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: