v2.4.0.6

Commitments and Contingencies (Borgata Commitments) (Details) (Borgata, USD $) In Millions, unless otherwise specified | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2007 | Dec. 31, 2012
Long-term Purchase Commitment [Line Items] |  |
Initial term of utility contract | 20 years | 50 years
Purchase Commitment, Thermal Energy Commitment |  |
Long-term Purchase Commitment [Line Items] |  |
Annual purchase commitments |  | 11.6
Long-Term Purchase Commitment, Electricity Commitment |  |
Long-term Purchase Commitment [Line Items] |  |
Annual purchase commitments |  | 1.7

X
- Definition Initial Term of Utility Contract + References No definition available. + Details
Name: | byd_InitialTermOfUtilityContract
Namespace Prefix: | byd_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
Name: | us-gaap_LongTermPurchaseCommitmentAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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