v2.4.0.6

Subsequent Events Subsequent Event (Details) (USD $) In Millions, unless otherwise specified | 0 Months Ended |  | 0 Months Ended |
--- | --- | --- | --- | ---
May 30, 2013 Senior Subordinated Notes 6.75% Senior Subordinated Notes Due 2014 Parent | Apr. 06, 2013 Senior Subordinated Notes 6.75% Senior Subordinated Notes Due 2014 Parent | Apr. 15, 2004 Senior Subordinated Notes 6.75% Senior Subordinated Notes Due 2014 Parent | Apr. 06, 2013 Senior Subordinated Notes 6.75% Senior Subordinated Notes Due 2014 Subsequent Event [Member] Parent | Mar. 31, 2013 Bank Credit Facility Term Loan | Mar. 31, 2013 LIBOR Bank Credit Facility Term Loan | Mar. 31, 2013 Base Rate Bank Credit Facility Term Loan | Mar. 31, 2013 Minimum Base Rate Bank Credit Facility Term Loan
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Debt instrument, interest rate, stated percentage |  |  | 6.75% | 6.75% |  |  |  |
Debt redeemed | $ 65.7 | $ 150.0 |  | $ 150.0 |  |  |  |
Redemption price, percentage | 100.00% | 100.00% |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 3.25% | 2.25% | 1.00%
Debt Instrument, Prepayment Fee, Percentage |  |  |  |  | 1.00% |  |  |
Debt Instrument, Amendment Fee, Percentage |  |  |  |  | 1.00% |  |  |

X
- Definition Debt Instrument, Amendment Fee, Percentage + References No definition available. + Details
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Namespace Prefix: | byd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Debt Instrument, Prepayment Fee, Percentage + References No definition available. + Details
Name: | byd_DebtInstrumentPrepaymentFeePercentage
Namespace Prefix: | byd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Debt Instrument, Redemption Price, Percentage + References No definition available. + Details
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Namespace Prefix: | byd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- 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

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- Definition Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 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 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Gross amount of debt extinguished. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration