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Derivative Financial Instruments - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended 70 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Apr. 30, 2021
Apr. 30, 2020
Apr. 30, 2015
Oct. 31, 2021
Derivative Financial Instruments (Textual) [Abstract]            
Collateral pledged $ 17.0 $ 54.6        
Cumulative net mark-to-market valuation of certain derivative positions recognized in unallocated derivative gains (losses) 15.9 37.3        
Interest expense – net (152.0) (160.9) $ (177.1)      
Other income (expense) – net $ (14.7) (19.1) (37.8)      
Amortization of deferred gain on early termination agreement   4.0 $ 8.4      
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 contract            
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 $ (200.7) (214.2)        
Tax impact related to deferred losses and gains on cash flow hedges included in accumulated other comprehensive loss 47.1 $ 50.3        
Effective portion of the hedge loss reclassified to interest expense over the next twelve months $ (13.6)          
Interest rate swap [Member] | Fair Value Hedging [Member]            
Derivative Financial Instruments (Textual) [Abstract]            
Amortization of deferred gain on early termination agreement           $ 53.5
Cash [Member] | Interest rate swap [Member] | Fair Value Hedging [Member]            
Derivative Financial Instruments (Textual) [Abstract]            
Gain (loss) on early termination agreement         $ 58.1  
Accrued and Prepaid Interest Net | Interest rate swap [Member] | Fair Value Hedging [Member]            
Derivative Financial Instruments (Textual) [Abstract]            
Gain (loss) on early termination agreement         $ 4.6