v3.26.1
Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Apr. 30, 2025
Jan. 31, 2025
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2024
Goodwill and Intangible Assets [Line Items]          
Amortization expense for finite-lived intangible assets     $ 209.5 $ 218.3 $ 190.1
Weighted-average useful life of the finite-lived intangible assets     23 years    
Estimated amortization expense for Year One     $ 231.6    
Estimated amortization expense for Year Two     231.9    
Estimated amortization expense for Year Three     204.1    
Estimated amortization expense for Year Four     177.0    
Estimated amortization expense for Year Five     174.0    
Other intangible assets impairment charges     454.2 320.9 0.0
Goodwill impairment charges     $ 507.5 [1] 1,661.6 [1] $ 0.0
Customer and contractual relationships          
Goodwill and Intangible Assets [Line Items]          
Weighted-average useful life of the finite-lived intangible assets     25 years    
Patents and technology          
Goodwill and Intangible Assets [Line Items]          
Weighted-average useful life of the finite-lived intangible assets     20 years    
Trademarks          
Goodwill and Intangible Assets [Line Items]          
Weighted-average useful life of the finite-lived intangible assets     20 years    
U.S. Retail Pet Foods          
Goodwill and Intangible Assets [Line Items]          
Goodwill impairment charges [1]     $ 0.0 0.0  
Sweet Baked Snacks          
Goodwill and Intangible Assets [Line Items]          
Other intangible assets impairment charges $ 112.7 $ 208.2 454.2    
Asset, Impairment Loss 980.0 1,000.0 961.7    
Goodwill impairment charges $ 867.3 $ 794.3 $ 507.5 [1] $ 1,661.6 [1]  
[1] Accumulated goodwill impairment charges of $2,412.0 have been recognized as of April 30, 2026.