Acquisitions - Intangibles (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2016	Sep. 25, 2015
2016 Acquisitions
Acquired intangible assets
Acquired intangible assets, fair value amount	$ 530
Acquired intangible assets, Weighted-Average Amortization Period	16 years
Measurement Specialties
Acquired intangible assets
Acquired intangible assets, fair value amount		$ 547
Acquired intangible assets, Weighted-Average Amortization Period		15 years
Customer relationships | 2016 Acquisitions
Acquired intangible assets
Acquired intangible assets, fair value amount	$ 300
Acquired intangible assets, Weighted-Average Amortization Period	18 years
Customer relationships | Measurement Specialties
Acquired intangible assets
Acquired intangible assets, fair value amount		$ 370
Acquired intangible assets, Weighted-Average Amortization Period		18 years
Developed technology | 2016 Acquisitions
Acquired intangible assets
Acquired intangible assets, fair value amount	$ 170
Acquired intangible assets, Weighted-Average Amortization Period	11 years
Developed technology | Measurement Specialties
Acquired intangible assets
Acquired intangible assets, fair value amount		$ 161
Acquired intangible assets, Weighted-Average Amortization Period		9 years
Trade names and trademarks | 2016 Acquisitions
Acquired intangible assets
Acquired intangible assets, fair value amount	$ 45
Acquired intangible assets, Weighted-Average Amortization Period	25 years
Trade names and trademarks | Measurement Specialties
Acquired intangible assets
Acquired intangible assets, fair value amount		$ 4
Acquired intangible assets, Weighted-Average Amortization Period		1 year
Customer order backlog | 2016 Acquisitions
Acquired intangible assets
Acquired intangible assets, fair value amount	$ 15
Acquired intangible assets, Weighted-Average Amortization Period	3 years
Customer order backlog | Measurement Specialties
Acquired intangible assets
Acquired intangible assets, fair value amount		$ 12
Customer order backlog | Measurement Specialties | Maximum
Acquired intangible assets
Acquired intangible assets, Weighted-Average Amortization Period		1 year