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Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Nov. 02, 2017
Entity Information [Line Items]
Document Fiscal Period Focus	Q3
Document Period End Date	Sep. 30, 2017
Document Fiscal Year Focus	2017
Entity Registrant Name	BOYD GAMING CORP
Entity Central Index Key	0000906553
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Document Type	10-Q
Amendment Flag	false
Entity Common Stock, Shares Outstanding		112,473,050

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The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

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The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word "Other".

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A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

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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.

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