Income Taxes (Provision for Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
Sep. 30, 2018	Oct. 01, 2017	Oct. 02, 2016
Income Tax Disclosure [Abstract]
Current taxes: U.S. federal	$ 156.2	$ 931.0	$ 704.1
Current taxes: U.S. state and local	52.0	170.8	166.5
Current taxes: Foreign	327.0	216.6	218.5
Total current taxes	535.2	1,318.4	1,089.1
Deferred taxes: U.S. federal	633.7	121.2	351.3
Deferred taxes: U.S. state and local	101.5	14.2	25.8
Deferred taxes: Foreign	(8.4)	(21.2)	(86.5)
Total deferred taxes	726.8	114.2	290.6
Total income tax expense	$ 1,262.0	$ 1,432.6	$ 1,379.7

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

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