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Organization and Basis of Presentation (Details)	3 Months Ended
	Mar. 31, 2015 property entity	Jan. 31, 2010
Consolidated Entities [Line Items]
Number of gaming entertainment properties	21byd_NumberOfGamingEntertainmentProperties
Number of controlling interests held	1byd_NumberOfControllingInterestsHeld
Subsidiary, Borgata
Consolidated Entities [Line Items]
Equity Method Investment, Ownership Percentage		50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage / dei_LegalEntityAxis = byd_SubsidiaryBorgataMember

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Number of Controlling Interests Held

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Number of Gaming Entertainment Properties

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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