Debt Instrument, Amendment Fee, Percentage

No definition available.

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- Definition

Debt Instrument, Prepayment Fee, Percentage

+ References

No definition available.

+ Details

Name:	byd_DebtInstrumentPrepaymentFeePercentage
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

- Definition

Line of Credit Facility, Amount Outstanding, Gross

+ References

No definition available.

+ Details

Name:	byd_LineOfCreditFacilityAmountOutstandingGross
Namespace Prefix:	byd_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit Facility, Covenant Terms, Minimum Consolidated Interest Coverage Ratio Required

+ References

No definition available.

+ Details

Name:	byd_LineOfCreditFacilityCovenantTermsMinimumConsolidatedInterestCoverageRatioRequired
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Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_DebtInstrumentLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of debt issuance costs (for example, but not limited to, legal, accounting, broker, and regulatory fees).

+ References

No definition available.

+ Details

Name:	us-gaap_DebtIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the charge against earnings during the period for commitment fees and debt issuance expenses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.8)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 8

-Article 5

+ Details

Name:	us-gaap_DebtRelatedCommitmentFeesAndDebtIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

- 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
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- 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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Long-Term Debt (Peninsula Bank Credit Facility Narrative) (Details) (USD $)				9 Months Ended					9 Months Ended
	Sep. 30, 2013 Parent Bank Credit Facility	Dec. 31, 2012 Parent Bank Credit Facility	Sep. 30, 2013 Parent Letter of Credit	Sep. 30, 2013 Subsidiary, Peninsula Gaming	May 01, 2013 Subsidiary, Peninsula Gaming	Sep. 30, 2013 Subsidiary, Peninsula Gaming Bank Credit Facility	Dec. 31, 2012 Subsidiary, Peninsula Gaming Bank Credit Facility	Sep. 30, 2013 Subsidiary, Peninsula Gaming Letter of Credit	Sep. 30, 2013 Eurodollar Rate Term Loan Subsidiary, Peninsula Gaming Bank Credit Facility	May 01, 2013 Eurodollar Rate Term Loan Subsidiary, Peninsula Gaming Bank Credit Facility	Aug. 08, 2013 Base Rate Term Loan Parent Bank Credit Facility	May 01, 2013 Base Rate Term Loan Subsidiary, Peninsula Gaming Bank Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 875,000,000
Interest rate at period end		3.70%				4.20%	5.70%
Amount outstanding, gross						826,200,000
Amount outstanding	1,443,400,000	1,466,635,000	8,500,000					5,800,000
Remaining borrowing capacity	293,600,000					31,800,000
Debt Instrument, Basis Spread on Variable Rate										3.25%	2.00%	2.25%
Debt Instrument, Reference Rate, Minimum									1.00%
Debt Instrument, Prepayment Fee, Percentage					1.00%
Debt Instrument, Amendment Fee, Percentage					1.00%
Financing Fees				10,200,000
Unamortized Debt Issuance Expense					8,200,000
Debt Related Commitment Fees and Debt Issuance Costs				$ 2,000,000
Line of Credit Facility, Covenant Terms, Minimum Consolidated Interest Coverage Ratio Required				2.0