The amount of project development preopening and writedowns.

No definition available.

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Namespace Prefix:	byd_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

The annual amount of unrecorded commitment to fund pre development costs.

+ References

No definition available.

+ Details

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Namespace Prefix:	byd_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Purchase price of expected business acquisition prior to consideration being transferred. Excludes asset acquisition.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 15
-Paragraph 3
-URI https://asc.fasb.org/extlink&oid=116873391&loc=d3e405-128459

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The net amount (to the extent disclosed within this portion of the income statement) by which an insurance settlement exceeds incremental costs incurred from the event causing an interruption of business, plus the insurance award for earnings lost from the event, such as a natural catastrophe, explosion or fire.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=114868897&loc=SL114872001-224240

+ Details

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Period Type:	duration

- Definition

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=byd_PalaInteractiveLLCMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Namespace Prefix:
Data Type:	na
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- Details

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Note 6 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
	Nov. 01, 2022	Sep. 30, 2022	Sep. 30, 2022	Jul. 31, 2012
Hurricane [Member]
Insurance Recoveries		$ 13.2
Gain on Business Interruption Insurance Recovery		$ 12.6	$ 12.6
Pala Interactive LLC [Member] \| Subsequent Event [Member]
Business Combination, Price of Acquisition, Expected	$ 170.1
Development Agreement [Member]
Project Development Preopening and Writedowns			$ 0.7
Development Agreement [Member] \| Minimum [Member]
Unrecorded Commitment to Fund Pre Development Costs, Annual Amount				$ 1.0
Development Agreement [Member] \| Maximum [Member]
Unrecorded Commitment to Fund Pre Development Costs, Annual Amount				$ 2.0