Earnings (Loss) Per Share (Reconciliation Of Basic And Diluted Earnings (Loss) Per Share) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended
Jul. 30, 2011	Jul. 31, 2010
Earnings (Loss) Per Share
Net loss attributable to Barnes & Noble, Inc.	$ (56,606)	$ (62,518)
Less allocation of earnings and dividends to participating securities
Net loss available to common shareholders	(56,606)	(62,518)
Effect of dilutive options
Net loss available to common shareholders	$ (56,606)	$ (62,518)
Basic weighted average common shares	57,153	55,770
Average dilutive options
Diluted weighted average common shares	57,153	55,770
Net loss attributable to Barnes & Noble, Inc. - Basic	$ (0.99)	$ (1.12)
Net loss attributable to Barnes & Noble, Inc. - Diluted	$ (0.99)	$ (1.12)

Includes adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions.

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