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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
May 25, 2019
May 26, 2018
May 25, 2019
May 26, 2018
Aug. 25, 2018
Percentage of domestic federal statutory tax rate 21.00% 25.90% 21.00% 25.90%  
Provisional net benefit         $ 20.1
Deferred tax reduction       $ 22.7 22.6
Effective income tax rate 23.50% 23.90% 24.80% 10.70%  
Discrete income tax benefit   $ 1.5      
Deferred income tax expense (benefit)       $ 22.7  
Transition tax       $ 2.5 $ 2.5
Maximum          
Percentage of domestic federal statutory tax rate     35.00%    
Minimum          
Percentage of domestic federal statutory tax rate     21.00%