Equity (Components Of Accumulated Other Comprehensive Income, Net Of Tax) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019	Mar. 29, 2020	Sep. 29, 2019	Mar. 31, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (8,624.3)	$ (4,319.0)	$ (8,624.3)	$ (4,319.0)	$ (7,532.9)	$ (6,231.0)	$ (5,035.2)	$ 1,175.8
Net gains/(losses) in AOCI, beginning of period			(503.3)
Other comprehensive income/(loss)	(8.1)	(77.5)	(31.4)	(18.7)
Net gains/(losses) in AOCI, end of period	(529.9)		(529.9)
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	17.3	495.6	17.3	495.6
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	3.2	7.9	3.2	5.6	3.9	0.1	(4.9)
Net gains/(losses) recognized in OCI before reclassifications	4.0	2.9	6.4	7.5
Net (gains)/losses reclassified from AOCI to earnings	(1.7)	0.2	(1.7)	0.6
Other comprehensive income/(loss)	2.3	3.1	4.7	8.1
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	(0.7)		(0.7)
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	(83.7)	6.1	(83.7)	6.1	(64.8)	11.0	4.3	17.7
Net gains/(losses) recognized in OCI before reclassifications	(22.3)	(2.6)	(93.2)	(18.8)
Net (gains)/losses reclassified from AOCI to earnings	3.4	4.4	(4.5)	7.2
Other comprehensive income/(loss)	(18.9)	1.8	(97.7)	(11.6)
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	3.0		3.0
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	27.3	(10.3)	27.3	(10.3)	47.8	(10.1)	5.5	19.6
Net gains/(losses) recognized in OCI before reclassifications	(18.4)	(15.8)	42.3	(29.9)
Net (gains)/losses reclassified from AOCI to earnings	(2.1)	0.0	(7.4)	0.0
Other comprehensive income/(loss)	(20.5)	(15.8)	34.9	(29.9)
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	2.5		2.5
Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(481.4)	(348.0)	(481.4)	(348.0)	(510.4)	(508.1)	(281.4)	(362.7)
Net gains/(losses) recognized in OCI before reclassifications	29.0	(64.9)	26.7	16.4
Net (gains)/losses reclassified from AOCI to earnings	0.0	(1.7)	0.0	(1.7)
Other comprehensive income/(loss)	29.0	(66.6)	26.7	14.7
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	0.0		0.0
Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(8,621.6)	(4,320.6)	(8,621.6)	(4,320.6)	(7,530.1)	(6,232.2)	(5,036.9)	1,169.5
Other comprehensive income/(loss)	(8.1)	(77.5)	(31.4)	(18.7)
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	17.3	495.6	17.3	495.6
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(529.9)	(349.0)	(529.9)	(349.0)	$ (521.8)	$ (503.3)	$ (271.5)	$ (330.3)
Net gains/(losses) recognized in OCI before reclassifications	(7.7)	(80.4)	(17.8)	(24.8)
Net (gains)/losses reclassified from AOCI to earnings	(0.4)	2.9	(13.6)	6.1
Other comprehensive income/(loss)	(8.1)	(77.5)	(31.4)	(18.7)
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	$ 4.8	$ 0.0	$ 4.8	$ 0.0