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Share-Based Compensation (Tables)
 12 Months Ended
Feb. 24, 2017
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 24,
2017
Performance units (1)
916,420

 
Restricted stock units
1,731,507

 
Total outstanding awards
2,647,927

 
________________________
(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:
 
2017 Awards
2016 Awards
2015 Awards
Three-year risk-free interest rate (1)
0.9
%
 
0.8
%
 
0.7
%
 
Expected term
3 years

 
3 years

 
3 years

 
Estimated volatility (2)
31.2
%
 
29.4
%
 
42.2
%
 
________________________
(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 2017, 2016 and 2015 was as follows:
Performance Units
Year Ended
February 24,
2017
February 26,
2016
February 27,
2015
Expense
$
5.6

 
$
7.4

 
$
5.1

 
Tax benefit
2.0

 
2.7

 
1.8

 
Schedule Of Share Based Compensation Performance Units Award Activity [Table Text Block]
The 2017 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 26, 2016
1,147,844

 
$
20.66

 
Granted
379,600

 
16.33

 
Vested
(611,024
)
 
20.00

 
Nonvested as of February 24, 2017
916,420

 
19.31

 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]
Grant Date Fair Value per TSR PSU
Year Ended
February 24,
2017
February 26,
2016
February 27,
2015
Weighted-average grant date fair value per share of TSR PSUs granted during 2017, 2016 and 2015
$
16.33

 
$
24.15

 
$
23.25

 
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 2017, 2016 and 2015 is as follows:
Restricted Stock Units
Year Ended
February 24,
2017
February 26,
2016
February 27,
2015
Expense
$
13.5

 
$
12.9

 
$
12.5

 
Tax benefit
4.9

 
4.6

 
4.5

 
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]
The 2017 activity for RSUs is as follows:
Nonvested Units
Total
Weighted-Average
Grant Date
Fair Value
per Share
Nonvested as of February 26, 2016
1,638,888

 
$
18.45

 
Granted
975,663

 
14.66

 
Vested
(846,337
)
 
16.47

 
Forfeited
(36,707
)
 
16.90

 
Nonvested as of February 24, 2017
1,731,507

 
16.38

 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value [Table Text Block]
Grant Date Fair Value per Share
Year Ended
February 24,
2017
February 26,
2016
February 27,
2015
Weighted-average grant date fair value per share of RSUs granted
$
14.66

 
$
18.82

 
$
16.68