v3.24.2.u1
Derivative Financial Instruments (Details Textual) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Nov. 15, 2023
Apr. 28, 2023
Jul. 31, 2024
Jul. 31, 2023
Apr. 30, 2024
Apr. 30, 2020
Derivative Financial Instruments (Textual) [Abstract]            
Collateral pledged     $ 46.7      
Collateral received         $ 1.9  
Cumulative net mark-to-market valuation of certain derivative positions recognized in unallocated derivative gains (losses)     (7.4)   22.6  
Interest expense – net     $ (100.4) $ (32.1)    
Post Holdings Inc. | Pet Food Brands [Member]            
Derivative Financial Instruments (Textual) [Abstract]            
Proceeds from divestitures - equity   5.4        
Proceeds from investment in equity securities $ 466.3          
Derivative, Gain (Loss) on Derivative, Net       $ 0.6 5.4  
Commodity contracts            
Derivative Financial Instruments (Textual) [Abstract]            
Derivative instrument maturity     1 year      
Foreign currency exchange contracts            
Derivative Financial Instruments (Textual) [Abstract]            
Derivative instrument maturity     1 year      
Interest rate contracts            
Derivative Financial Instruments (Textual) [Abstract]            
Deferred pre-tax net gain (loss) included in accumulated other comprehensive loss           $ (239.8)
Deferred Gain (Loss) on Cash Flow Hedges Included in Accumulated Other Comprehensive Income or Loss     $ (183.7)   (187.1)  
Tax impact related to deferred losses and gains on cash flow hedges included in accumulated other comprehensive loss     43.2   $ 44.0  
Effective portion of the hedge loss reclassified to interest expense over the next twelve months     $ (13.7)