Segment Reporting (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 27, 2020	Dec. 29, 2019
Segment Reporting Information [Line Items]
Revenues	$ 6,749.4	$ 7,097.1
Operating income/(loss)	913.5	1,219.8
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Revenues	4,703.2	5,010.9
Operating income/(loss)	813.5	1,098.8
Operating Segments [Member] | International [Member]
Segment Reporting Information [Line Items]
Revenues	1,654.3	1,571.1
Operating income/(loss)	274.8	275.9
Operating Segments [Member] | Channel Development [Member]
Segment Reporting Information [Line Items]
Revenues	371.4	494.6
Operating income/(loss)	180.8	175.5
Operating Segments [Member] | Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenues	20.5	20.5
Operating income/(loss)	$ (355.6)	$ (330.4)