Income Taxes (Schedule of Income Taxes Payable) (Details) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 25, 2015
Operating Loss Carryforwards [Line Items]
Other income tax liabilities	$ 67.7	$ 121.3
Total income taxes payable	179.5	136.9
Accrued and Other Current Liabilities
Operating Loss Carryforwards [Line Items]
Accrued and other current liabilities	111.8	15.6
Other Income Tax Liabilities
Operating Loss Carryforwards [Line Items]
Other income tax liabilities	$ 67.7	$ 121.3