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Additional Provision for Doubtful Trade Account (Details) (Borders Group, Inc. [Member], USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Jan. 31, 2011
Borders Group, Inc. [Member]
Financing Receivable, Impaired [Line Items]
Pre-tax bad debt provision	$ 9.3
After-tax bad debt provision	$ 6.0
After-tax bad debt provision (in dollars per share)	$ 0.10

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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