Income Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 29, 2019	Sep. 30, 2018	Oct. 01, 2017
Income Tax Disclosure [Abstract]
Current taxes: U.S. federal	$ 1,414.3	$ 156.2	$ 931.0
Current taxes: U.S. state and local	447.8	52.0	170.8
Current taxes: Foreign	458.3	327.0	216.6
Total current taxes	2,320.4	535.2	1,318.4
Deferred taxes: U.S. federal	(1,074.5)	633.7	121.2
Deferred taxes: U.S. state and local	(322.4)	101.5	14.2
Deferred taxes: Foreign	(51.9)	(8.4)	(21.2)
Total deferred taxes	(1,448.8)	726.8	114.2
Total income tax expense	$ 871.6	$ 1,262.0	$ 1,432.6

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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