Other Intangible Assets and Goodwill Other Intangible Assets and Goodwill (Finite-Lived Intangible Assets) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2018	Dec. 31, 2017	Sep. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 1,190.2		$ 1,182.2
Accumulated amortization	(431.0)		(371.0)
Net carrying amount	759.2		811.2
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	54.5	$ 14.0
Acquired and reacquired rights
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	1,089.0		1,081.7
Accumulated amortization	(377.0)		(320.1)
Net carrying amount	712.0		761.6
Acquired trade secrets and processes [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	27.6		27.6
Accumulated amortization	(17.2)		(16.5)
Net carrying amount	10.4		11.1
Trade Names, Trademarks and Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	33.2		33.0
Accumulated amortization	(20.1)		(19.5)
Net carrying amount	13.1		13.5
Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	14.7		14.3
Accumulated amortization	(5.6)		(5.1)
Net carrying amount	9.1		9.2
Other finite-lived intangible assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	25.7		25.6
Accumulated amortization	(11.1)		(9.8)
Net carrying amount	$ 14.6		$ 15.8