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Share-Based Compensation (Tables)
3 Months Ended
May 25, 2018
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:
 
2019 Awards
2018 Awards
2017 Awards
Three-year risk-free interest rate (1)
2.6
%
1.4
%
0.9
%
Expected term
3 years

3 years

3 years

Estimated volatility (2)
33.8
%
31.8
%
31.2
%
_______________________________________
(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 months ended May 25, 2018 and May 26, 2017 are as follows:
 
Three Months Ended
Performance Units
May 25,
2018
May 26,
2017
Expense
$
2.3

 
$
1.6

 
Tax benefit
0.6

 
0.6

 
Schedule of Performance Unit Awards Activity
The PSU activity for the three months ended May 25, 2018 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 23, 2018
688,600

$
18.77

Granted
367,800

18.02

Nonvested as of May 25, 2018
1,056,400

$
18.50

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 months ended May 25, 2018 and May 26, 2017 are as follows:
 
Three Months Ended
Restricted Stock Units
May 25,
2018
May 26,
2017
Expense
$
6.7

 
$
6.5

 
Tax benefit
1.8

 
2.4

 
Schedule of Restricted Stock Unit Awards Activity
The RSU activity for the three months ended May 25, 2018 is as follows:
Nonvested Units
Total
Weighted-Average
Grant Date
Fair Value
per Unit
Nonvested as of February 23, 2018
1,789,775

$
15.75

Granted
698,668

14.28

Vested
(20,428
)
18.24

Forfeited
(12,367
)
16.32

Nonvested as of May 25, 2018
2,455,648

$
15.30