Revenue from Contracts with Customers Disaggregation of Revenues (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | $ 1,411.3 | $ 1,433.1 |
| Cereal and Granola | ||
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | 556.2 | 555.7 |
| Egg and Egg Products | ||
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | 394.7 | 381.1 |
| Cheese and Dairy | ||
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | 70.3 | 71.7 |
| Side Dishes | ||
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | 145.7 | 56.2 |
| Sausage | ||
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | 43.6 | 0.0 |
| Pasta | ||
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | 0.0 | 67.6 |
| Protein-based Products and Supplements | ||
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | 185.8 | 186.0 |
| Nut Butters and Dried Nut and Fruit | ||
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | 0.0 | 114.3 |
| Other | ||
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | 15.4 | 1.6 |
| Eliminations | ||
| Disaggregation of Revenue [Line Items] | ||
| Net Sales | $ (0.4) | $ (1.1) |