Income Taxes (Schedule of Deferred Taxes Activity) (Details) - USD ($) $ in Millions	Sep. 25, 2015	Sep. 26, 2014
Deferred tax assets:
Accrued liabilities and reserves	$ 92.5	$ 68.9
Inventories	23.2	21.4
Tax loss and credit carryforwards	163.3	93.8
Environmental liabilities	23.6	29.5
Rebate reserves	48.5	41.1
Expired product	26.3	39.0
Postretirement benefits	33.8	34.5
Federal and state benefit of uncertain tax positions and interest	33.6	29.5
Share-based compensation	18.9	28.1
Other	20.2	32.0
Total deferred tax assets, gross	589.6	427.4
Deferred Tax Assets, Goodwill and Intangible Assets	105.7	9.6
Deferred tax liabilities:
Property, plant and equipment	(140.1)	(121.6)
Intangible assets	(1,550.7)	(2,177.9)
Installment sale	(1,465.3)	(93.6)
Investment in partnership	(187.9)	(191.3)
Total deferred tax liabilities, gross	(3,344.0)	(2,584.4)
Net deferred tax (liability) before valuation allowances	(2,754.4)	(2,157.0)
Valuation allowances	(233.0)	(76.9)
Net deferred tax (liability)	$ (2,987.4)	$ (2,233.9)