Income Taxes (Schedule of Deferred Taxes Activity) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 25, 2015
Deferred tax assets:
Accrued liabilities and reserves	$ 80.8	$ 91.0
Inventories	35.4	21.4
Tax loss and credit carryforwards	332.3	159.5
Environmental liabilities	28.6	23.6
Rebate reserves	48.7	48.1
Expired product	12.2	26.3
Postretirement benefits	48.7	37.3
Federal and state benefit of uncertain tax positions and interest	17.4	33.6
Share-based compensation	22.1	17.6
Other	14.9	8.7
Total deferred tax assets, gross	982.9	572.8
Deferred Tax Assets, Goodwill and Intangible Assets	341.8	105.7
Deferred tax liabilities:
Property, plant and equipment	(111.3)	(111.8)
Intangible assets	(775.1)	(1,550.7)
Installment sale	(1,902.9)	(1,465.3)
Investment in partnership	(186.0)	(187.9)
Total deferred tax liabilities, gross	(2,975.3)	(3,315.7)
Net deferred tax (liability) before valuation allowances	(1,992.4)	(2,742.9)
Valuation allowances	(564.9)	(233.0)
Deferred Tax Liabilities, Net	$ (2,557.3)	$ (2,975.9)