XML 107 R88.htm IDEA: XBRL DOCUMENT v3.10.0.1

Commitments and Contingencies (Capital Spending and Development) (Details)	12 Months Ended
	Dec. 31, 2018
Kansas Star | Mulvane Special Tax Assessment for Utilities [Member]
Other Commitments [Line Items]
Other Commitment, Time Period	15 years

X

- Definition

Other Commitment, Time Period

+ References

No definition available.

+ Details

Name:	byd_OtherCommitmentTimePeriod
Namespace Prefix:	byd_
Data Type:	xbrli:durationItemType
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_OtherCommitmentsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis=byd_KansasStarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_OtherCommitmentsAxis=byd_MulvaneSpecialTaxAssessmentForUtilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: