Segment Reporting (Reconciliation Of Total Segment Operating Income To Consolidated Earnings Before Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 29, 2020	Mar. 31, 2019	Mar. 29, 2020	Mar. 31, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	$ 5,995.7	$ 6,305.9	$ 13,092.8	$ 12,938.7
Depreciation and amortization expenses	356.3	356.2	707.4	689.6
Income from equity investees	67.9	62.3	141.9	130.1
Operating income/(loss)	487.4	857.7	1,707.2	1,873.4
Americas Segment [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	4,330.0	4,314.1	9,340.9	8,926.6
Depreciation and amortization expenses	191.5	173.0	380.7	339.9
Income from equity investees	0.0	0.0	0.0	0.0
Operating income/(loss)	621.2	856.4	1,720.0	1,825.2
International Segment | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	1,134.6	1,529.4	2,705.7	3,033.5
Depreciation and amortization expenses	130.0	130.4	256.7	257.3
Income from equity investees	24.8	22.1	55.8	48.5
Operating income/(loss)	(15.4)	201.8	260.5	431.9
Channel Development [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	519.1	446.6	1,013.7	951.1
Depreciation and amortization expenses	0.3	12.3	0.6	12.4
Income from equity investees	43.1	40.2	86.1	81.6
Operating income/(loss)	189.6	148.9	365.1	324.6
Corporate and Other [Member] | Operating Segments [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Revenues	12.0	15.8	32.5	27.5
Depreciation and amortization expenses	34.5	40.5	69.4	80.0
Income from equity investees	0.0	0.0	0.0	0.0
Operating income/(loss)	$ (308.0)	$ (349.4)	$ (638.4)	$ (708.3)