Goodwill and Intangible Assets (Schedule Of Intangible Assets) (Details) - USD ($) $ in Millions	Mar. 25, 2016	Sep. 25, 2015
Schedule of Intangible Asset by Major Class [Line Items]
Finite-lived intangible assets, gross	$ 10,322.4	$ 10,198.0
Accumulated amortization	1,231.4	882.9
Indefinite-lived intangible assets, gross	334.3	351.2
Trademarks
Schedule of Intangible Asset by Major Class [Line Items]
Indefinite-lived intangible assets, gross	35.0	35.0
In-process Research and Development
Schedule of Intangible Asset by Major Class [Line Items]
Indefinite-lived intangible assets, gross	299.3	316.2
Completed Technology
Schedule of Intangible Asset by Major Class [Line Items]
Finite-lived intangible assets, gross	10,020.1	9,896.0
Accumulated amortization	1,104.4	765.8
Licenses
Schedule of Intangible Asset by Major Class [Line Items]
Finite-lived intangible assets, gross	185.1	185.1
Accumulated amortization	106.1	99.8
Customer Relationships
Schedule of Intangible Asset by Major Class [Line Items]
Finite-lived intangible assets, gross	28.3	28.1
Accumulated amortization	6.1	4.4
Trademarks
Schedule of Intangible Asset by Major Class [Line Items]
Finite-lived intangible assets, gross	82.2	82.1
Accumulated amortization	8.1	6.2
Other
Schedule of Intangible Asset by Major Class [Line Items]
Finite-lived intangible assets, gross	6.7	6.7
Accumulated amortization	$ 6.7	$ 6.7