v2.4.0.6

Summary of Significant Accounting Policies (Promotional Allowances) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Allowances [Line Items] |  |  |
Promotional allowances | $ 450,676 | $ 419,939 | $ 353,825
Cost of promotional allowances | 266,102 | 235,794 | 230,429
Rooms |  |  |
Allowances [Line Items] |  |  |
Promotional allowances | 144,605 | 130,168 | 109,268
Cost of promotional allowances | 62,323 | 58,821 | 53,928
Food and Beverage |  |  |
Allowances [Line Items] |  |  |
Promotional allowances | 191,419 | 175,391 | 159,229
Cost of promotional allowances | 182,138 | 158,881 | 159,617
Other Products and Services |  |  |
Allowances [Line Items] |  |  |
Promotional allowances | 114,652 | 114,380 | 85,328
Cost of promotional allowances | $ 21,641 | $ 18,092 | $ 16,884

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

X
- 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