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Stock Incentive Plan (Tables)
 3 Months Ended
May 24, 2013
Performance Units [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
The total PSU expense and associated tax benefit for all outstanding awards for the three months ended May 24, 2013 and May 25, 2012 are as follows:
 
Three Months Ended
Performance Units
May 24,
2013
May 25,
2012
Expense
$
5.2

 
$
3.4

 
Tax benefit
2.0

 
1.3

 
Schedule of Share-based Payment Award, Performance Units, Valuation Assumptions [Table Text Block]
Monte Carlo simulation model to calculate the fair value of these PSUs on the date of grant. The model resulted in a weighted average grant date fair value of $15.51 per unit for these PSUs, compared to $11.92 and $16.56 per unit for PSUs granted in 2013 and 2012, respectively. The weighted average grant date fair values were determined using the following assumptions:
 
2014 Awards
2013 Awards
2012 Awards
Three-year risk-free interest rate (1)
0.3
%
0.5
%
1.4
%
Expected term
3 years

3 years

3 years

Estimated volatility (2)
44.7
%
49.8
%
50.9
%
_______________________________________
(1)
Based on the U.S. government bond benchmark on the grant date.
(2)
Represents the historical price volatility of the Company’s common stock for the three-year period preceding the grant date.
Schedule of Share-based Compensation, Performance Units, Award Activity [Table Text Block]
The PSU activity for the three months ended May 24, 2013 is as follows:
Maximum Number of Shares That May Be Issued Under Nonvested Units
Total
Weighted-Average
Grant Date
Fair Value per Unit
Nonvested as of February 22, 2013
1,932,030

$
13.96

Granted
839,448

14.08

Nonvested as of May 24, 2013
2,771,478

$
14.00
Restricted Stock Units [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
The RSU expense and associated tax benefit for all outstanding awards for the three months ended May 24, 2013 and May 25, 2012 are as follows:
 
Three Months Ended
Restricted Stock Units
May 24,
2013
May 25,
2012
Expense
$
5.6

 
$
1.6

 
Tax benefit
2.0

 
0.6

 
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
The RSU activity for the three months ended May 24, 2013 is as follows:
Nonvested Units
Total
Weighted-Average
Grant Date
Fair Value
per Unit
Nonvested as of February 22, 2013
1,221,227

$
9.42

Granted
803,993

12.72

Vested
(19,892
)
8.13

Forfeited
(12,000
)
9.09

Nonvested as of May 24, 2013
1,993,328

$
10.76