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Share-Based Compensation (Tables)
 6 Months Ended
Aug. 29, 2014
Performance Units [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Valuation Assumptions for Performance Unit Awards
The weighted average grant date fair values were determined using the following assumptions:
 
2015 Awards
2014 Awards
2013 Awards
Three-year risk-free interest rate (1)
0.7
%
0.3
%
0.5
%
Expected term
3 years

3 years

3 years

Estimated volatility (2)
42.2
%
44.7
%
49.8
%
_______________________________________
(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 Compensation Costs by Plan for Share-based Payment Arrangements
The total PSU expense and associated tax benefit for all outstanding awards for the three and six months ended August 29, 2014 and August 23, 2013 are as follows:
 
Three Months Ended
Six Months Ended
Performance Units
August 29,
2014
August 23,
2013
August 29,
2014
August 23,
2013
Expense
$
0.9

 
$
0.2

 
$
3.5

 
$
5.4

 
Tax benefit
0.3

 
0.1

 
1.3

 
2.1

 
Schedule of Performance Unit Awards Activity
The PSU activity for the six months ended August 29, 2014 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 28, 2014
1,833,288

$
14.04

Granted
611,024

19.97

Nonvested as of August 29, 2014
2,444,312

$
14.65
Restricted Stock Units [Member]
  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Compensation Costs by Plan for Share-based Payment Arrangements
The RSU expense and associated tax benefit for all outstanding awards for the three and six months ended August 29, 2014 and August 23, 2013 are as follows:
 
Three Months Ended
Six Months Ended
Restricted Stock Units
August 29,
2014
August 23,
2013
August 29,
2014
August 23,
2013
Expense
$
2.0

 
$
1.2

 
$
8.7

 
$
6.8

 
Tax benefit
0.7

 
0.2

 
3.1

 
2.2

 
Schedule of Restricted Stock Unit Awards Activity
The RSU activity for the six months ended August 29, 2014 is as follows:
Nonvested Units
Total
Weighted-Average
Grant Date
Fair Value
per Unit
Nonvested as of February 28, 2014
2,001,758

$
11.71

Granted
709,518

16.63

Vested
(223,989
)
14.43

Forfeited
(26,463
)
12.92

Nonvested as of August 29, 2014
2,460,824

$
13.20