v2.4.0.6

Segment Information (Reconciliation of Capital Expenditures) (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | $ 108,643 | $ 84,563 | $ 48,783
Change in Accrued Property Additions | 17,331 | 2,661 | 27,175
Cash-Based Capital Expenditures | 125,974 | 87,224 | 75,958
Las Vegas Locals |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | 23,349 | 15,782 | 11,863
Downtown Las Vegas |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | 7,248 | 4,420 | 3,356
Midwest and South |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | 60,572 | 19,770 | 18,632
Peninsula Gaming |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | 7,606 | 0 | 0
Atlantic City |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | 34,742 | 32,626 | 12,637
Reportable Segment |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | 133,517 | 72,598 | 46,488
Corporate |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | 706 | 106 | (1,797)
Other |  |  |
Segment Reporting, Other Significant Reconciling Item [Line Items] |  |  |
Capital Expenditures | $ (25,580) | $ 11,859 | $ 4,092

X
- Definition Capital Expenditures + References No definition available. + Details
Name: | byd_CapitalExpenditures
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Cash-Based Capital Expenditures + References No definition available. + Details
Name: | byd_CashBasedCapitalExpenditures
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (Decrease) in Accrued Property Additions + References No definition available. + Details
Name: | byd_IncreaseDecreaseInAccruedPropertyAdditions
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_SegmentReportingOtherSignificantReconcilingItemLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration