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Other Intangible Assets (Details) (USD $) In Millions	Jul. 30, 2011
Other Intangible Assets (Textuals) [Abstract]
Trademark and intellectual property right	$ 7.0

X

- Definition

Trademark and intellectual property right.

+ Details

Name:	bfa_AcquiredIntangibleAssetAmount
Namespace Prefix:	bfa
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Other Intangible assets.

+ Details

Name:	bfa_OtherIntangibleAssetsTextualsAbstract
Namespace Prefix:	bfa
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration