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Share-Based Compensation (Tables)
 12 Months Ended
Feb. 28, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule of Share Based Payment Award Outstanding Awards [Table Text Block]
Share-based awards currently outstanding under the Incentive Compensation Plan are as follows:
Total Outstanding Awards
February 28,
2020
Performance units (1)
605,080

 
Restricted stock units
1,761,124

 
Total outstanding awards
2,366,204

 
________________________
(1)
This amount includes the maximum number of shares that may be issued under outstanding performance unit awards; however, the actual number of shares which may be issued will be determined based on the satisfaction of certain criteria, and therefore may be significantly lower.
Performance Shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Schedule Of Share Based Payment Award Performance Units Valuation Assumptions [Table Text Block] The Monte Carlo simulation was computed using the following assumptions:
 
2020 Awards
2019 Awards
2018 Awards
Three-year risk-free interest rate (1)
2.3
%
 
2.6
%
 
1.4
%
 
Expected term
3 years

 
3 years

 
3 years

 
Estimated volatility (2)
32.5
%
 
33.8
%
 
31.8
%
 
________________________
(1)
Based on the U.S. Government bond benchmark on the grant date.
(2)
Represents the historical price volatility of our Company’s Class A Common Stock for the three-year period preceding the grant date.
Share-based Payment Arrangement, Cost by Plan [Table Text Block]
The total PSU expense and associated tax benefit for all outstanding awards in 2020, 2019 and 2018 are as follows:
Performance Units
Year Ended
February 28,
2020
February 22,
2019
February 23,
2018
Expense
$
2.7

 
$
4.2

 
$
5.0

 
Tax benefit
0.7

 
1.1

 
1.7

 
Schedule Of Share Based Compensation Performance Units Award Activity [Table Text Block]
The 2020 PSU activity is as follows:
Maximum Number of Nonvested Units
Total
Weighted-Average
Grant Date
Fair Value per Unit
Nonvested as of February 22, 2019
676,800

 
$
18.50

 
Granted
237,280

 
16.21

 
Vested
(309,000
)
 
21.76

 
Nonvested as of February 28, 2020
605,080

 
17.39

 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]
The Monte Carlo simulation resulted in the following weighted-average grant date fair values per PSU:
Grant Date Fair Value per PSU
Year Ended
February 28,
2020
February 22,
2019
February 23,
2018
Weighted-average grant date fair value per share of PSUs granted
$
16.21

 
$
18.02

 
$
21.76

 
Restricted Stock Units (RSUs) [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Payment Arrangement, Cost by Plan [Table Text Block] 2020, 2019 and 2018 are as follows:
Restricted Stock Units
Year Ended
February 28,
2020
February 22,
2019
February 23,
2018
Expense
$
13.3

 
$
12.7

 
$
13.4

 
Tax benefit
3.6

 
3.4

 
4.5

 
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
The 2020 RSU activity is as follows:
Nonvested Units
Total
Weighted-Average
Grant Date
Fair Value
per Share
Nonvested as of February 22, 2019
1,721,896

 
$
15.39

 
Granted
842,609

 
15.84

 
Vested
(760,628
)
 
16.21

 
Forfeited
(42,753
)
 
15.40

 
Nonvested as of February 28, 2020
1,761,124

 
15.28

 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]
The weighted-average grant date fair value per share of RSUs granted in 2020, 2019 and 2018 is as follows:
Grant Date Fair Value per Share
Year Ended
February 28,
2020
February 22,
2019
February 23,
2018
Weighted-average grant date fair value per share of RSUs granted
$
15.84

 
$
14.67

 
$
16.51