Equity (Components Of Accumulated Other Comprehensive Income, Net Of Tax) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 30, 2025	Mar. 31, 2024	Mar. 30, 2025	Mar. 31, 2024	Dec. 29, 2024	Sep. 29, 2024	Dec. 31, 2023	Oct. 01, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (7,615.4)	$ (8,442.2)	$ (7,615.4)	$ (8,442.2)	$ (7,464.6)	$ (7,441.6)	$ (8,608.9)	$ (7,987.8)
Net gains/(losses) in AOCI, beginning of period			(428.8)
Other comprehensive income/(loss)	54.6	(63.7)	(100.2)	156.7
Net gains/(losses) in AOCI, end of period	(529.0)		(529.0)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		(7.9)		(7.9)	(3.7)	(2.3)	(7.9)	(12.3)
Net gains/(losses) recognized in OCI before reclassifications	1.7	(0.3)	0.1	3.9
Net (gains)/losses reclassified from AOCI to earnings	0.2	0.3	0.4	0.5
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	1.9	0.0	0.5	4.4
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		40.6		40.6	94.2	70.5	15.7	(47.5)
Net gains/(losses) recognized in OCI before reclassifications	(4.9)	27.1	46.6	60.7
Net (gains)/losses reclassified from AOCI to earnings	(22.0)	(2.2)	(49.8)	27.4
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(26.9)	24.9	(3.2)	88.1
Accumulated Net Investment Hedge Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		279.2		279.2	382.1	247.7	217.7	243.3
Net gains/(losses) recognized in OCI before reclassifications	9.8	69.2	164.9	50.3
Net (gains)/losses reclassified from AOCI to earnings	(20.8)	(7.7)	(41.5)	(14.4)
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	(11.0)	61.5	123.4	35.9
Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		(933.4)		(933.4)	(1,056.2)	(744.7)	(783.3)	(961.7)
Net gains/(losses) recognized in OCI before reclassifications	90.6	(150.0)	(220.6)	28.2
Net (gains)/losses reclassified from AOCI to earnings	0.0	0.0	0.0	0.0
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	90.6	(150.0)	(220.6)	28.2
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(7,622.5)	(8,449.4)	(7,622.5)	(8,449.4)	(7,471.7)	(7,448.9)	(8,616.0)	(7,994.8)
Other comprehensive income/(loss)	54.6	(63.6)	(99.9)	156.6
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(529.0)	(621.5)	(529.0)	(621.5)	$ (583.6)	$ (428.8)	$ (557.8)	$ (778.2)
Net gains/(losses) recognized in OCI before reclassifications	97.2	(54.0)	(9.0)	143.1
Net (gains)/losses reclassified from AOCI to earnings	(42.6)	(9.6)	(90.9)	13.5
Other Comprehensive Income (Loss), before Tax, Portion Attributable to Parent	54.6	(63.6)	(99.9)	156.6
Other comprehensive income/(loss)	54.6	(63.6)	(99.9)	156.6
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest		0.0	0.0	0.0
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Including Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(1.8)		(1.8)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest		0.0	0.0	0.0
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	67.3		67.3
Accumulated Net Investment Hedge Gain (Loss) Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest		0.0	0.0	0.0
AOCI, Accumulated Net Investment Hedge Gain (Loss) Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	371.1		371.1
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest		(0.1)	(0.3)	0.1
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(965.6)		(965.6)
AOCI Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Noncontrolling Interest		$ (0.1)	(0.3)	$ 0.1
AOCI Including Portion Attributable to Noncontrolling Interest
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (529.0)		$ (529.0)