Equity (Impact of Reclassifications from Accumulated Other Comprehensive Income on Earnings) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 29, 2019	Dec. 30, 2018
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts Reclassified from AOCI, Interest income and other, net	$ 15.9	$ 24.8
Revenues	7,097.1	6,632.7
Amounts Reclassified from AOCI, Interest expense	(91.9)	(75.0)
Amounts Reclassified from AOCI, Cost of sales including occupancy costs	(2,236.4)	(2,175.8)
Amounts Reclassified from AOCI, Tax (expense)/benefit	(258.5)	(205.1)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts Reclassified from AOCI, Total before tax	10.7	(8.1)
Amounts Reclassified from AOCI, Tax (expense)/benefit	(2.3)	0.7
Amounts Reclassified from AOCI, Net of tax	8.4	(7.4)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts Reclassified from AOCI, Net of tax	0.1	0.3
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts Reclassified from AOCI, Interest income and other, net	(0.2)	0.5
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts Reclassified from AOCI, Net of tax	(6.1)	7.1
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts Reclassified from AOCI, Total before tax	(7.6)	8.6
Accumulated Net Investment Hedge Gain (Loss) Attributable to Parent [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts Reclassified from AOCI, Net of tax	(2.4)	0.0
Accumulated Net Investment Hedge Gain (Loss) Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts Reclassified from AOCI, Interest income and other, net	3.3	0.0
Translation Adjustment [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amounts Reclassified from AOCI, Net of tax	$ 0.0	$ 0.0