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Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($) $ in Millions	Mar. 30, 2019	Sep. 29, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 5,238.9	$ 5,571.8
Accumulated Amortization	3,364.0	3,173.2
Developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	4,285.8	4,573.3
Accumulated Amortization	2,666.8	2,505.8
In-process research and development
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	14.3	5.5
Accumulated Amortization	0.0	0.0
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	545.5	556.5
Accumulated Amortization	444.8	428.1
Trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	283.7	312.5
Accumulated Amortization	184.6	175.0
Distribution agreement
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	24.2	42.0
Accumulated Amortization	10.6	8.0
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1.5	1.5
Accumulated Amortization	0.7	0.5
Business licenses
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	2.4	2.4
Accumulated Amortization	2.3	2.2
Total acquired intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	5,157.4	5,493.7
Accumulated Amortization	3,309.8	3,119.6
Internal-use software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	56.9	58.5
Accumulated Amortization	48.6	49.3
Capitalized software embedded in products
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	24.5	19.6
Accumulated Amortization	$ 5.6	$ 4.3

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
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