Equity (Changes in Components Of Accumulated Other Comprehensive Income, Net Of Tax) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 27, 2020	Sep. 29, 2019	Sep. 30, 2018	Oct. 01, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	$ 17.3	$ 495.6
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(7,799.4)	(6,231.0)	$ 1,175.8	$ 5,457.0
Other comprehensive income/(loss)	133.9	(173.0)	(174.7)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	(0.7)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	5.7	3.9	(4.9)	(2.5)
Net gains/(losses) recognized in OCI before reclassifications, net of tax	6.5	8.2	(5.1)
Net (gains)/losses reclassified from AOCI to earnings, net of tax	(4.0)	0.6	2.7
Other comprehensive income/(loss)	2.5	8.8	(2.4)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	3.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(82.1)	11.0	17.7	(4.1)
Net gains/(losses) recognized in OCI before reclassifications, net of tax	(95.0)	(10.7)	17.9
Net (gains)/losses reclassified from AOCI to earnings, net of tax	(1.1)	4.0	3.9
Other comprehensive income/(loss)	(96.1)	(6.7)	21.8
Accumulated Net Investment Hedge Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	2.5
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	11.5	(10.1)	19.6	14.0
Net gains/(losses) recognized in OCI before reclassifications, net of tax	28.9	(29.7)	5.6
Net (gains)/losses reclassified from AOCI to earnings, net of tax	(9.8)	0.0	0.0
Other comprehensive income/(loss)	19.1	(29.7)	5.6
Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(299.7)	(508.1)	(362.7)	(163.0)
Net gains/(losses) recognized in OCI before reclassifications, net of tax	208.4	(143.7)	(216.6)
Net (gains)/losses reclassified from AOCI to earnings, net of tax	0.0	(1.7)	16.9
Other comprehensive income/(loss)	208.4	(145.4)	(199.7)
Accumulated Other Comprehensive Income/(Loss) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative Effect of New Accounting Pronouncement in Period of Adoption	4.8	0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(364.6)	(503.3)	(330.3)	$ (155.6)
Net gains/(losses) recognized in OCI before reclassifications, net of tax	148.8	(175.9)	(198.2)
Net (gains)/losses reclassified from AOCI to earnings, net of tax	(14.9)	2.9	23.5
Other comprehensive income/(loss)	$ 133.9	$ (173.0)	$ (174.7)