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Share-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Feb. 25, 2022
Feb. 26, 2021
Feb. 28, 2020
Share-based Payment Arrangement [Abstract]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 5,484,088    
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Nonvested, Number 4,651,271    
Performance and restricted stock units expense (credit) $ (1.8) $ 0.0 $ 0.0
2022 PSU's      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 448,300    
2021 PSU's      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 529,500    
2020 PSU's      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 296,600    
Director Share-Based Compensation [Member]      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period 61,360 64,107 41,941
Restricted Stock Units (RSUs) [Member]      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 3,445,438 2,285,965  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 13.08 $ 9.49 $ 15.84
Performance and restricted stock units expense (credit) $ 13.7 $ 12.4 $ 13.3
Share-based Payment Arrangement, Expense, Tax Benefit $ 3.5 $ 3.1 3.6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 11.86 $ 12.11  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 2,064,722    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (811,242)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 15.54    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options $ 18.8    
Units issued as common stock $ 10.1 $ 10.7 12.6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period (94,007)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value $ 12.81    
Performance Shares [Member]      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 1,205,833 898,156  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Intrinsic Value $ 6.1 $ 3.7 1.6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 14.38    
Performance and restricted stock units expense (credit) $ 1.6 7.7 2.7
Share-based Payment Arrangement, Expense, Tax Benefit $ 0.4 $ 2.0 0.7
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value $ 14.21 $ 14.06  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period 1,019,517    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period (711,840)    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value $ 14.26    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options $ 0.2    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 1 year 4 months 24 days    
Units issued as common stock $ 2.5 $ 6.4 $ 1.7
Performance Shares [Member] | 2022 PSU's      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 14.38    
Performance Shares [Member] | 2022 PSU's | Tranche 1      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 0.30%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 53.50%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 3 years    
Performance Shares [Member] | 2021 PSU's      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 13.29  
Performance Shares [Member] | 2021 PSU's | Tranche 1      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate [1] 0.20%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate [2] 58.10%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 2 years    
Performance Shares [Member] | 2021 PSU's | Tranche 2      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 0.20%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 61.30%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 2 years    
Performance Shares [Member] | 2020 PSU's      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value     $ 16.21
Performance Shares [Member] | 2020 PSU's | Tranche 1      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 2.30%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 32.50%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 3 years    
Performance Shares [Member] | 2020 PSU's | Tranche 2      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate 0.10%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 74.10%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 1 year    
Performance Shares [Member] | 2020 PSU's | Tranche 3      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate [1] 0.10%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate [2] 56.10%    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 1 year    
Restricted Stock [Member]      
Share-Based Compensation Details [Line Items]      
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 1 year 10 months 24 days    
Director Share-Based Compensation [Member]      
Share-Based Compensation Details [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value $ 13.81 $ 12.21 $ 17.31
Maximum [Member]      
Share-Based Compensation Details [Line Items]      
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Shares Earned [3] 1,205,833    
Minimum [Member]      
Share-Based Compensation Details [Line Items]      
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Shares Earned 0    
[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.
[3] 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 conditions, and therefore may be significantly lower.