Income Taxes (Schedule of Income Taxes Payable) (Details) - USD ($) $ in Millions	Sep. 25, 2015	Sep. 26, 2014
Operating Loss Carryforwards [Line Items]
Total income taxes payable	$ 141.1	$ 135.7
Accrued and Other Current Liabilities
Operating Loss Carryforwards [Line Items]
Accrued and other current liabilities	19.8	13.1
Other Income Tax Liabilities
Operating Loss Carryforwards [Line Items]
Other income tax liabilities	$ 121.3	$ 122.6