EQUITY PLANS (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Jul. 28, 2012	Dec. 16, 2010
Equity plans
Share-based compensation expense	$ 14.6	$ 15.1	$ 11.4
Long term incentive plan term	2 years
Unrecognized compensation cost	26.5
Estimated weighted-average period for unrecognized compensation cost (in years)	2 years 6 months
Stock Incentive Plan 1996
Equity plans
Maximum term of options granted	10 years
Shares authorized for grant under the plans	9,050,000
Stock Incentive Plan 2002
Equity plans
Maximum term of options granted	10 years
Shares authorized for grant under the plans	9,050,000
Equity Incentive Plan 2004
Equity plans
Portion vested on grant	0.3333
Maximum term of options granted	10 years
Shares authorized for grant under the plans	2,500,000
Number of shares available for grant	349,648			1,054,267
Number of equal annual installments in which awards are vested for employees (in installments)	4
Number of equal annual installments in which awards are vested for non-employee directors	3
Equity Incentive Plan 2012
Equity plans
Shares authorized for grant under the plans	9,050,000
Number of shares available for grant	878,794
Performance-based share awards
Equity plans
Share-based compensation expense	$ 1.0	$ 3.3	$ 2.1
Stock options
Equity plans
Number of stock option plans	4
Graded vesting period for employees	4 years
Graded vesting period for non-employee directors	2 years
Portion vested on grant	0.3333
Weighted average assumptions
Expected volatility	28.50%	29.80%	39.30%
Dividend yield	0.00%	0.00%	0.00%
Risk free interest rate	1.20%	0.30%	0.40%
Expected term (in years)	3 years	3 years	3 years