| Segment Reporting Information, by Segment and Disaggregated Revenue |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Three Months Ended
March 31, | | Six Months Ended
March 31, | | | | 2024 | | 2023 | | 2024 | | 2023 | | Net Sales | | | | | | | | | Post Consumer Brands | $ | 1,065.5 | | | $ | 599.1 | | | $ | 2,054.1 | | | $ | 1,153.8 | | | Weetabix | 138.0 | | | 124.9 | | | 267.1 | | | 243.0 | | | Foodservice | 554.8 | | | 633.2 | | | 1,121.9 | | | 1,233.7 | | | Refrigerated Retail | 240.4 | | | 262.7 | | | 521.3 | | | 555.7 | | | | | | | | | | | | | | | | | | | | | Eliminations and Corporate | 0.3 | | | — | | | 0.5 | | | — | | | Total | $ | 1,999.0 | | | $ | 1,619.9 | | | $ | 3,964.9 | | | $ | 3,186.2 | | | Segment Profit | | | | | | | | | Post Consumer Brands | $ | 139.7 | | | $ | 75.5 | | | $ | 272.4 | | | $ | 154.8 | | | Weetabix | 18.1 | | | 19.4 | | | 39.1 | | | 40.9 | | | Foodservice | 64.5 | | | 78.1 | | | 140.2 | | | 157.2 | | | Refrigerated Retail | 22.4 | | | 18.2 | | | 58.0 | | | 39.2 | | | | | | | | | | | | | | | | | | | | | Total segment profit | 244.7 | | | 191.2 | | | 509.7 | | | 392.1 | | | General corporate expenses and other | 51.8 | | | 50.0 | | | 104.0 | | | 87.6 | | | | | | | | | | | Interest expense, net | 80.0 | | | 63.8 | | | 158.1 | | | 129.7 | | | Loss (gain) on extinguishment of debt, net | 0.3 | | | (6.1) | | | (2.8) | | | (14.8) | | | (Income) expense on swaps, net | (13.3) | | | 9.0 | | | 7.8 | | | (3.3) | | | | | | | | | | | Earnings before income taxes and equity method loss | $ | 125.9 | | | $ | 74.5 | | | $ | 242.6 | | | $ | 192.9 | | | Net sales by product | | | | | | | | | Cereal | $ | 706.6 | | | $ | 690.3 | | | $ | 1,361.8 | | | $ | 1,327.7 | | | Eggs and egg products | 517.0 | | | 609.4 | | | 1,039.8 | | | 1,178.1 | | | Side dishes (including potato products) | 184.8 | | | 184.7 | | | 401.8 | | | 390.0 | | | Pet food | 460.7 | | | — | | | 887.3 | | | — | | | Cheese and dairy | 41.4 | | | 47.9 | | | 90.0 | | | 101.0 | | | Sausage | 40.1 | | | 40.2 | | | 89.2 | | | 92.3 | | | Peanut butter | 27.3 | | | 26.0 | | | 54.7 | | | 54.9 | | | Protein-based products | 8.4 | | | 7.7 | | | 13.5 | | | 14.2 | | | | | | | | | | | | | | | | | | | | | Other | 12.7 | | | 14.5 | | | 26.8 | | | 28.8 | | | Eliminations | — | | | (0.8) | | | — | | | (0.8) | | | Total | $ | 1,999.0 | | | $ | 1,619.9 | | | $ | 3,964.9 | | | $ | 3,186.2 | | | Depreciation and amortization | | | | | | | | | Post Consumer Brands | $ | 51.7 | | | $ | 32.8 | | | $ | 101.2 | | | $ | 65.1 | | | Weetabix | 9.8 | | | 8.9 | | | 19.4 | | | 17.4 | | | Foodservice | 33.3 | | | 32.0 | | | 65.8 | | | 63.7 | | | Refrigerated Retail | 17.7 | | | 19.3 | | | 35.6 | | | 38.3 | | | | | | | | | | | | | | | | | | | | | | Total segment depreciation and amortization | 112.5 | | | 93.0 | | | 222.0 | | | 184.5 | | | Corporate | 7.1 | | | 1.2 | | | 10.0 | | | 2.3 | | | Total | $ | 119.6 | | | $ | 94.2 | | | $ | 232.0 | | | $ | 186.8 | | | | | | | | | | | | | | | | | | | Assets | | | | | March 31,
2024 | | September 30, 2023 | | Post Consumer Brands | | | | | $ | 4,983.5 | | | $ | 4,782.2 | | | Weetabix | | | | | 1,818.6 | | | 1,737.8 | | | Foodservice and Refrigerated Retail | | | | | 4,924.5 | | | 4,921.6 | | | | | | | | | | | | | | | | | | | | | Corporate | | | | | 464.5 | | | 205.1 | | | Total assets | | | | | $ | 12,191.1 | | | $ | 11,646.7 | | | | | | | | | | | | | | | | | | | | | |
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