Segment Reporting (Reconciliation Of Total Segment Operating Income To Consolidated Earnings Before Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 27, 2020	Dec. 29, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 6,749.4	$ 7,097.1
Depreciation and amortization expenses	366.1	351.0
Income from equity investees	82.7	73.9
Operating income/(loss)	913.5	1,219.8
Americas [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	4,703.2	5,010.9
Depreciation and amortization expenses	188.9	189.2
Income from equity investees	0.0	0.0
Operating income/(loss)	813.5	1,098.8
International [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,654.3	1,571.1
Depreciation and amortization expenses	140.0	126.6
Income from equity investees	26.3	30.9
Operating income/(loss)	274.8	275.9
Channel Development [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	371.4	494.6
Depreciation and amortization expenses	0.2	0.3
Income from equity investees	56.4	43.0
Operating income/(loss)	180.8	175.5
Corporate and Other [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	20.5	20.5
Depreciation and amortization expenses	37.0	34.9
Income from equity investees	0.0	0.0
Operating income/(loss)	$ (355.6)	$ (330.4)