XML 81 R59.htm IDEA: XBRL DOCUMENT v3.22.2.2
Goodwill (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2020
Goodwill [Line Items]      
Goodwill $ 4,349.6 $ 4,501.6  
Operating Segments      
Goodwill [Line Items]      
Goodwill (gross) 5,007.4 5,159.4 $ 5,030.5
Accumulated impairment losses (657.8) (657.8) (657.8)
Goodwill 4,349.6 4,501.6 $ 4,372.7
Goodwill acquired 14.2 88.8  
Goodwill, Sale of Business (4.2)    
Currency translation adjustment $ (162.0) $ 40.1  
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount 10.00% 15.00% 13.00%
Operating Segments | Cheese and dairy      
Goodwill [Line Items]      
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount 6.50%    
Operating Segments | Post Consumer Brands Segment      
Goodwill [Line Items]      
Goodwill (gross) $ 2,066.8 $ 2,067.1 $ 2,011.8
Accumulated impairment losses (609.1) (609.1) (609.1)
Goodwill 1,457.7 1,458.0 1,402.7
Goodwill acquired 0.0 55.1  
Goodwill, Sale of Business 0.0    
Currency translation adjustment (0.3) 0.2  
Operating Segments | Weetabix Segment      
Goodwill [Line Items]      
Goodwill (gross) 781.6 929.4 889.5
Accumulated impairment losses 0.0 0.0 0.0
Goodwill 781.6 929.4 889.5
Goodwill acquired 13.9 0.0  
Goodwill, Sale of Business 0.0    
Currency translation adjustment (161.7) 39.9  
Operating Segments | Foodservice Segment      
Goodwill [Line Items]      
Goodwill (gross) 1,355.3 1,355.0 1,335.6
Accumulated impairment losses 0.0 0.0 0.0
Goodwill 1,355.3 1,355.0 $ 1,335.6
Goodwill acquired 0.3 19.4  
Goodwill, Sale of Business 0.0    
Currency translation adjustment 0.0 $ 0.0  
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount   11.00% 4.00%
Operating Segments | Refrigerated Retail Segment      
Goodwill [Line Items]      
Goodwill (gross) 803.7 $ 807.9 $ 793.6
Accumulated impairment losses (48.7) (48.7) (48.7)
Goodwill 755.0 759.2 $ 744.9
Goodwill acquired 0.0 14.3  
Goodwill, Sale of Business (4.2)    
Currency translation adjustment $ 0.0 $ 0.0  
Operating Segments | Refrigerated Retail      
Goodwill [Line Items]      
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount 8.50%