Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jul. 28, 2012

The changes in the sales return reserve for each period are summarized below:

	Fiscal Years Ended
	July 28, 2012			July 30, 2011			July 31, 2010
	(millions)
Balance at beginning of period	$	4.6		$	4.8		$	1.9
Additions from acquisitions		2.0			—			9.0
Additions – charged to income		12.0			12.5			11.2
Adjustments and/or deductions		(11.1	)		(12.7	)		(17.3	)
Balance at end of period	$	7.5		$	4.6		$	4.8

Reconciliation of Weighted Average Number of Common Shares Outstanding used to Calculate Basic Net Income per Common Share to Shares used in Calculating Diluted Net Income per Common Share

The weighted-average number of common shares outstanding used to calculate basic net income per common share is reconciled to those shares used in calculating diluted net income per common share as follows:

	Fiscal Years Ended
	July 28,		July 30,		July 31,
	2012		2011		2010
	(millions)
Basic		153.5		156.1		144.4
Dilutive effect of stock options, restricted stock, restricted stock units and convertible debt securities		5.9		5.7		9.6
Diluted shares		159.4		161.8		154.0

Property and Equipment Estimated Useful Lives

Depreciation is calculated using the straight-line method over the following estimated useful lives:

Buildings and improvements		10-40 years
Distribution center equipment and machinery		3-20 years
Leasehold improvements		Shorter of the useful life or expected term of the lease
Furniture, fixtures, and equipment		2-10 years
Informational technology		3-10 years