v2.4.0.6

Summary of Significant Accounting Policies (Promotional Allowances) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Allowances [Line Items] |  |
Promotional allowances | $ 111,923 | $ 110,626
Cost of promotional allowances | 64,896 | 65,484
Rooms |  |
Allowances [Line Items] |  |
Promotional allowances | 35,120 | 34,682
Cost of promotional allowances | 14,711 | 14,827
Food and Beverage |  |
Allowances [Line Items] |  |
Promotional allowances | 50,788 | 48,298
Cost of promotional allowances | 45,059 | 44,851
Other Products and Services |  |
Allowances [Line Items] |  |
Promotional allowances | 26,015 | 27,646
Cost of promotional allowances | $ 5,126 | $ 5,806

X
- Details
Name: | byd_AllowancesLineItems
Namespace Prefix: | byd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Cost of Promotional Allowances + References No definition available. + Details
Name: | byd_CostOfPromotionalAllowances
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition This element represents the estimated retail value of accommodations, food and beverage, and other services furnished to guests without charge. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 605 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6472957&loc=d3e51325-107943 + Details
Name: | us-gaap_PromotionalAllowances
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration