Income Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 29, 2013
Income Tax Disclosure [Abstract]
Current taxes: U.S. federal, Total	$ 801.0	$ 822.7	$ 616.6
Current taxes: U.S. federal, Related to litigation charge			0.0
Current taxes: U.S. federal, All Other			616.6
Current taxes: U.S. state and local, Total	150.1	132.9	93.8
Current taxes: U.S. state and local, Related to litigation charge			0.0
Current taxes: U.S. state and local, All Other			93.8
Current taxes: Foreign, Total	172.2	128.8	95.9
Current taxes: Foreign, Related to litigation charge			0.0
Current taxes: Foreign, All Other			95.9
Total current taxes	1,123.3	1,084.4	806.3
Total current taxes, Related to litigation charge			0.0
Total current taxes, All Other			806.3
Deferred taxes: U.S. federal, Total	56.5	12.0	(898.8)
Deferred taxes: U.S. federal, Related to litigation charge			(922.3)
Deferred taxes: U.S. federal, All Other			23.5
Deferred taxes: U.S. state and local, Total	4.0	(4.9)	(144.0)
Deferred taxes: U.S. state and local, Related to litigation charge			(148.7)
Deferred taxes: U.S. state and local, All Other			4.7
Deferred taxes: Foreign	(40.1)	0.5	(2.2)
Deferred taxes: Foreign, Related to litigation charge			0.0
Deferred taxes: Foreign, All Other			(2.2)
Total deferred taxes	20.4	7.6	(1,045.0)
Total deferred taxes, Related to litigation charge			(1,071.0)
Total deferred taxes, All Other			26.0
Total income tax expense/(benefit)	$ 1,143.7	$ 1,092.0	(238.7)
Total income tax expense/(benefit), Related to litigation charge			(1,071.0)
Total income tax expense/(benefit), All Other			$ 832.3