v2.4.0.6

Long-Term Debt (Borgata Bank Credit Facility Narrative) (Details) (Bank Credit Facility, USD $) |  |  |  |  | 0 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 Borgata | Mar. 31, 2013 Parent Company | Dec. 31, 2012 Parent Company | Mar. 31, 2013 Borgata Bank Credit Facility Amendment Subsidiary, Borgata [Member] | Dec. 27, 2012 Borgata Bank Credit Facility Amendment Subsidiary, Borgata [Member] Minimum | Mar. 31, 2013 Borgata Bank Credit Facility Amendment Borgata
Debt Instrument [Line Items] |  |  |  |  |  |
Amount outstanding |  | $ 1,437,695,000 | $ 1,466,635,000 |  |  | $ 14,000,000
Interest rate at period end | 4.90% | 4.20% |  | 4.90% |  |
Remaining borrowing capacity |  | 278,398,000 |  |  |  | 46,000,000
Debt Instrument, Covenant Terms, Consolidated EBITDA Required for Repurchase or Redemption of Senior Secured Notes |  |  |  |  | $ 125,000,000 |

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- Definition Debt Instrument, Covenant Terms, Consolidated EBITDA Required for Repurchase or Redemption of Senior Secured Notes + References No definition available. + Details
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Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
Name: | us-gaap_LineOfCreditFacilityAmountOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The effective interest rate at the end of the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant