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Earnings Per Share (Tables)
 12 Months Ended
Feb. 24, 2017
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
Computation of Earnings per Share
Year Ended
February 24,
2017
February 26,
2016
February 27,
2015
Net income
$
124.6

 
$
170.3

 
$
86.1

 
Adjustment for earnings attributable to participating securities
(2.4
)
 
(3.4
)
 
(1.6
)
 
Net income used in calculating earnings per share
$
122.2

 
$
166.9

 
$
84.5

 
Weighted-average common shares outstanding including participating securities (in millions)
120.7

 
124.3

 
124.4

 
Adjustment for participating securities (in millions)
(2.3
)
 
(2.5
)
 
(2.3
)
 
Shares used in calculating basic earnings per share (in millions)
118.4

 
121.8

 
122.1

 
Effect of dilutive stock-based compensation (in millions)
0.5

 
1.0

 
1.6

 
Shares used in calculating diluted earnings per share (in millions)
118.9

 
122.8

 
123.7

 
Earnings per share:
 
 
 
 
 
 
Basic
$
1.03

 
$
1.37

 
$
0.69

 
Diluted
$
1.03

 
$
1.36

 
$
0.68

 
Total common shares outstanding at period end (in millions)
117.3

 
119.4

 
121.5

 
Anti-dilutive performance units excluded from computation of diluted earnings per share (in millions)
0.3

 
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