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Equity and Cost Investments (Tables)
12 Months Ended
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