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Intangible Assets and Goodwill - Schedule of Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 30, 2023	Sep. 30, 2023
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 5,352.1	$ 5,342.0
Accumulated Amortization	4,519.4	4,453.4
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	4,419.7	4,411.0
Accumulated Amortization	3,698.9	3,649.5
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	22.4	25.7
Accumulated Amortization	0.0	0.0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	602.6	600.0
Accumulated Amortization	559.6	550.6
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	254.1	253.6
Accumulated Amortization	219.0	212.8
Total acquired intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	5,298.8	5,290.3
Accumulated Amortization	4,477.5	4,412.9
Internal-use software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	24.9	24.0
Accumulated Amortization	18.7	17.8
Capitalized software embedded in products
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	28.4	27.7
Accumulated Amortization	$ 23.2	$ 22.7

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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