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Equity and Cost Investments (Tables) | 12 Months Ended
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Sep. 30, 2018
Equity Method Investments and Joint Ventures [Abstract] |
Schedule of Equity and Cost Method Investments | Equity and Cost Investments (in millions)
| Sep 30, 2018 |  | Oct 1, 2017
Equity method investments | $ | 296.0 |  |  | $ | 432.8 |
Cost method investments | 38.7 |  |  | 48.8 |
Total | $ | 334.7 |  |  | $ | 481.6 |

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