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Share-Based Compensation (Tables)
 12 Months Ended
Feb. 22, 2019
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 22,
2019
Performance units (1)
676,800

 
Restricted stock units
1,721,896

 
Total outstanding awards
2,398,696

 
________________________
(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 Units [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:
 
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 our Company’s Class A Common Stock for the three-year period preceding the grant date.
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]
The total performance units expense and associated tax benefit in 2019, 2018 and 2017 was as follows:
Performance Units
Year Ended
February 22,
2019
February 23,
2018
February 24,
2017
Expense
$
4.2

 
$
5.0

 
$
5.6

 
Tax benefit
1.1

 
1.7

 
2.0

 
Schedule Of Share Based Compensation Performance Units Award Activity [Table Text Block]
The 2019 activity for performance units is as follows:
Maximum Number of 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

 
Vested
(379,600
)
 
16.33

 
Nonvested as of February 22, 2019
676,800

 
18.50

 
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 TSR PSU:
Grant Date Fair Value per TSR PSU
Year Ended
February 22,
2019
February 23,
2018
February 24,
2017
Weighted-average grant date fair value per share of TSR PSUs granted
$
18.02

 
$
21.76

 
$
16.33

 
Restricted Stock Units (RSUs) [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 RSUs expense and associated tax benefit in 2019, 2018 and 2017 is as follows:
Restricted Stock Units
Year Ended
February 22,
2019
February 23,
2018
February 24,
2017
Expense
$
12.7

 
$
13.4

 
$
13.5

 
Tax benefit
3.4

 
4.5

 
4.9

 
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
The 2019 activity for RSUs is as follows:
Nonvested Units
Total
Weighted-Average
Grant Date
Fair Value
per Share
Nonvested as of February 23, 2018
1,789,775

 
$
15.75

 
Granted
857,829

 
14.67

 
Vested
(882,940
)
 
15.41

 
Forfeited
(42,768
)
 
15.48

 
Nonvested as of February 22, 2019
1,721,896

 
15.39

 
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 2019, 2018 and 2017 is as follows:
Grant Date Fair Value per Share
Year Ended
February 22,
2019
February 23,
2018
February 24,
2017
Weighted-average grant date fair value per share of RSUs granted
$
14.67

 
$
16.51

 
$
14.66