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Goodwill (Tables)
6 Months Ended
Mar. 31, 2024
Goodwill  
Carrying Amount of Goodwill
Post Consumer BrandsWeetabixFoodserviceRefrigerated RetailTotal
Balance, September 30, 2023
Goodwill (gross)$2,261.1 $854.3 $1,355.3 $803.7 $5,274.4 
Accumulated impairment losses(609.1)— — (90.9)(700.0)
Goodwill (net)$1,652.0 $854.3 $1,355.3 $712.8 $4,574.4 
Goodwill from acquisition42.7 — — — 42.7 
Currency translation adjustment— 29.9 — — 29.9 
Balance, March 31, 2024
Goodwill (gross)$2,303.8 $884.2 $1,355.3 $803.7 $5,347.0 
Accumulated impairment losses(609.1)— — (90.9)(700.0)
Goodwill (net)$1,694.7 $884.2 $1,355.3 $712.8 $4,647.0