v2.4.0.6

Long-Term Debt (Borgata Bank Credit Facility Narrative) (Details) (USD $) | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  |  | 0 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Aug. 06, 2010 Borgata | Dec. 31, 2012 Borgata Bank Credit Facility | Dec. 31, 2011 Borgata Bank Credit Facility | Dec. 31, 2010 Borgata Bank Credit Facility | Aug. 06, 2010 Borgata Bank Credit Facility | Aug. 06, 2010 Borgata Senior Secured Notes | Dec. 31, 2012 Borgata Bank Credit Facility Amendment Borgata Bank Credit Facility | Dec. 27, 2012 Borgata Bank Credit Facility Amendment Borgata Bank Credit Facility | Nov. 11, 2011 Borgata Bank Credit Facility Amendment Borgata Bank Credit Facility | Dec. 27, 2012 Borgata Bank Credit Facility Amendment Borgata Bank Credit Facility Minimum | Nov. 11, 2011 Borgata Bank Credit Facility Amendment Borgata Bank Credit Facility Minimum | Dec. 31, 2012 Borgata Bank Credit Facility Amendment Borgata Bank Credit Facility Minimum | Dec. 31, 2012 Borgata Bank Credit Facility Amendment Borgata Bank Credit Facility Maximum | Dec. 31, 2012 Borgata Bank Credit Facility Amendment Borgata Bank Credit Facility One-month Eurodollar
For the year ending December 31, |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments of debt issuance costs | $ 65,083,000 | $ 15,374,000 | $ 27,057,000 |  | $ 400,000 | $ 1,200,000 | $ 3,000,000 |  |  |  |  |  |  |  |  |  |
Debt financing, maximum borrowing capacity |  |  |  | 950,000,000 |  |  |  | 150,000,000 |  |  |  |  |  |  |  |  |
Line of credit, maximum borrowing capacity |  |  |  |  |  |  |  |  |  |  | 60,000,000 | 60,000,000 |  |  |  |  |
Face amount |  |  |  |  |  |  |  |  | 800,000,000 |  |  |  |  |  |  |  |
Consolidated EBITDA required |  |  |  |  |  |  |  |  |  |  |  |  | 110,000,000 | 110,000,000 |  |  |
Amount outstanding threshold over which borrowing to fund repurchase of senior notes is prohibited |  |  |  |  |  |  |  |  |  |  |  |  | 50,000,000 |  |  |  |
Consolidated EBITDA required for repurchase or redemption of senior secured notes |  |  |  |  |  |  |  |  |  |  |  |  | 125,000,000 |  |  |  |
Interest rate spread, alternative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.00%
Percentage bearing variable interest, percentage rate |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.50% |  |
Debt instrument, reference rate, minimum |  |  |  |  |  |  |  |  |  | 1.50% |  |  |  |  |  |  |
Commitment fee percentage on unused portion of credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% | 1.00% |
Amount outstanding |  |  |  |  |  |  |  |  |  | 20,000,000 |  |  |  |  |  |  |
Interest rate at period end |  |  |  |  |  |  |  |  |  | 4.94% |  |  |  |  |  |  |
Remaining borrowing capacity |  |  |  |  |  |  |  |  |  | $ 40,000,000 |  |  |  |  |  |  |

X
- Definition Debt Instrument, Covenant, Amount Outstanding Threshold, Limit for Borrowing to Fund Repurchase of Debt + References No definition available. + Details
Name: | byd_DebtInstrumentCovenantAmountOutstandingThresholdLimitForBorrowingToFundRepurchaseOfDebt
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument, Covenant Terms, Consolidated EBITDA Required + References No definition available. + Details
Name: | byd_DebtInstrumentCovenantTermsConsolidatedEbitdaRequired
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Debt Instrument, Maximum Borrowing Capacity + References No definition available. + Details
Name: | byd_DebtInstrumentMaximumBorrowingCapacity
Namespace Prefix: | byd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Debt Instrument, Reference Rate, Minimum + References No definition available. + Details
Name: | byd_DebtInstrumentReferenceRateMinimum
Namespace Prefix: | byd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage points added to the reference rate to compute the variable rate on the debt instrument. + References No definition available. + Details
Name: | us-gaap_DebtInstrumentBasisSpreadOnVariableRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 21 -Paragraph 16, 20 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_DebtInstrumentFaceAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- 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

X
- 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
Name: | us-gaap_LineOfCreditFacilityInterestRateAtPeriodEnd
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 129 -Paragraph 2, 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: 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 3: 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_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
Name: | us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility. + References No definition available. + Details
Name: | us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LongTermDebtPercentageBearingVariableInterestRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 95-13 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
Name: | us-gaap_PaymentsOfDebtIssuanceCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration