Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Jun. 27, 2015
Income Taxes [Line Items]
Effective tax rate on income from continuing operations	14.80%	11.40%
Unrecognized Tax Benefits, Including Income Tax Penalties And Interest Accrued	$ 399.0		$ 384.3
Unrecognized tax benefits liability, interest and penalties accrued	$ 69.0		65.7
Income Tax Examination, Penalties and Interest Expense			8.0
Incremental tax obligation			$ 68.9