v2.4.0.6

Summary of Significant Accounting Policies (Gaming Taxes) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Summary of Significant Accounting Policies [Abstract]
Taxes, Other	$ 102.3	$ 71.3

X

- Details

Name:	byd_SummaryOfSignificantAccountingPoliciesAbstract
Namespace Prefix:	byd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Taxes, excluding payroll, income and excise taxes, if not included elsewhere, that could include production, real and personal property, and other selling and distribution-related taxes.

+ References

No definition available.

+ Details

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