v2.4.0.6

Accumulated Other Comprehensive Loss | 12 Months Ended
--- | ---
Dec. 31, 2012
Accumulated Other Comprehensive Loss [Abstract] |
Accumulated Other Comprehensive Loss | ACCUMULATED OTHER COMPREHENSIVE LOSS Comprehensive income includes net income and all other non-stockholder changes in equity, or other comprehensive income. Components of the Company's comprehensive income are reported in the accompanying consolidated statements of comprehensive income. The cumulative balance of other comprehensive income consists of fair value adjustments related to hedged derivative instruments and unrealized gains and losses on the investment available for sale resulting from changes in fair value. A portion of the net derivative instruments market adjustment included in accumulated other comprehensive loss, net, at December 31, 2011 relates to certain derivative instruments that we de-designated as cash flow hedges. The following table reports the effects of the changes in the fair valuations of certain of our financial instruments.
| Year Ended December 31,
| 2012 |  | 2011 |  | 2010
| (In thousands)
Fair value adjustment of derivative instruments | $ | — |  |  | $ | 11,824 |  |  | $ | 16,356 |
Fair value adjustment of investment available for sale | (962 | ) |  | — |  |  | — |
Tax effect | — |  |  | (4,230 | ) |  | (5,824 | )
Fair value adjustments, net of tax | $ | (962 | ) |  | $ | 7,594 |  |  | $ | 10,532 |

X
- Details
Name: | byd_AccumulatedOtherComprehensiveLossAbstract
Namespace Prefix: | byd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other Comprehensive Income (Loss) [Text Block] + References No definition available. + Details
Name: | byd_OtherComprehensiveIncomeLossTextBlock
Namespace Prefix: | byd_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration