Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income Tax Expense (Benefit)	$ 174.8	$ 361.1	$ 1,086.5	$ 1,070.1
Earnings per share - diluted	$ 0.61	$ 0.47	$ 2.67	$ 1.43
Earnings Per Share, Basic	$ 0.62	$ 0.48	$ 2.69	$ 1.44
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income Tax Expense (Benefit)	$ 6.1		$ 50.5
Earnings per share - diluted	$ 0.04		$ 40,000
Excess tax benefit on share-based awards		$ 69.4
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 6.1		$ 50.5
Earnings Per Share, Basic	$ 0.00		$ 0