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Note 11 - Stock-based Compensation (Details Textual) - USD ($)
$ / shares in Units, shares in Millions
3 Months Ended 9 Months Ended
Nov. 25, 2017
Nov. 26, 2016
Nov. 25, 2017
Nov. 26, 2016
Allocated Share-based Compensation Expense $ 15,900,000 $ 16,700,000 $ 52,800,000 $ 54,300,000
Allocated Share-based Compensation Expense, Net of Tax $ 10,300,000 $ 11,000,000 $ 32,500,000 $ 34,700,000
Stock Based Compensation Expense, Impact On Diluted Earnings Per Share $ 0.07 $ 0.07 $ 0.23 $ 0.23
Employee Service Share-based Compensation, Allocation of Recognized Period Costs, Capitalized Amount     $ 1,500,000 $ 1,600,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options $ 20,200,000   $ 20,200,000  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term     4 years 109 days  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value 0   $ 0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term     2 years 328 days  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value 0   $ 0  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value     3,900,000 9,000,000
Proceeds from Stock Options Exercised     10,161,000 $ 20,258,000
Employee Service Share-based Compensation, Tax Benefit (Expense) from Exercise of Stock Options     $ (200,000)  
Performance Shares [Member]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     1 year 328 days  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options $ 29,400,000   $ 29,400,000  
Share Based Compensation Arrangement By Share Based Payment Award Target Award Percentage 150.00%   150.00%  
Employee Stock Option [Member]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     3 years  
Restricted Stock [Member]        
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition     4 years 255 days  
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options $ 150,800,000   $ 150,800,000  
The 2012 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 43.2   43.2  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 9.50 $ 11.87
The 2012 Plan [Member] | Employee Stock Options and Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years  
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Minimum     1 year  
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Maximum     3 years  
The 2012 Plan [Member] | Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     4 years  
The 2012 Plan [Member] | Performance Shares [Member] | Scenario Assumption [Member]        
Share Based Compensation Arrangement By Share Based Payment Award Target Award Percentage 100.00%   100.00%  
The 2012 Plan [Member] | Performance Shares [Member] | One-year Performance Period Awards [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     4 years  
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Minimum     1 year  
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Maximum     3 years  
The 2012 Plan [Member] | Performance Shares [Member] | Minimum [Member]        
Share Based Compensation Arrangement By Share Based Payment Award Target Award Percentage 0.00%   0.00%  
The 2012 Plan [Member] | Employee Stock Option [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     3 years  
The 2012 Plan [Member] | Employee Stock Option [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years  
The 2012 Plan [Member] | Employee Stock Option Issued Since May 10, 2010 [Member]        
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Minimum     1 year  
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Maximum     3 years  
Share Based Compensation Arrangement By Share Based Payment Award Requisite Service Period     1 year  
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period     8 years  
The 2012 Plan [Member] | Restricted Stock [Member]        
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period     5 years  
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Minimum     1 year  
Share Based Compensation Arrangement By Share Based Payment Award Award Requisite Service Period Maximum     3 years