Acquisitions - Assets Acquired (Details) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended								12 Months Ended
	Oct. 31, 2014 USD ($) $ / shares	Sep. 30, 2016 USD ($)	Jun. 24, 2016 USD ($)	Mar. 25, 2016 USD ($)	Dec. 25, 2015 USD ($)	Sep. 25, 2015 USD ($)	Jun. 26, 2015 USD ($)	Mar. 27, 2015 USD ($)	Dec. 26, 2014 USD ($)	Sep. 30, 2016 USD ($) item $ / shares	Sep. 25, 2015 USD ($) item $ / shares	Sep. 26, 2014 USD ($) item $ / shares
Acquisitions
Number of Businesses Acquired | item										4
Allocation of the purchase price
Goodwill		$ 5,492				$ 4,824				$ 5,492	$ 4,824	$ 3,726
Short-term debt		331				498				331	498
Net cash paid										1,336	1,725	522
Net sales		3,332	$ 3,121	$ 2,952	$ 2,833	2,984	$ 3,118	$ 3,082	$ 3,049	12,238	12,233	11,973
Operating income (loss)										$ 1,902	$ 1,749	$ 1,805
Amortization of fair value adjustments to inventories and customer order backlog									$ 27
2016 Acquisitions
Acquisitions
Number of Businesses Acquired | item										4
Allocation of the purchase price
Cash and cash equivalents		75								$ 75
Other current assets		88								88
Goodwill		836								836
Intangible assets		530								530
Other non-current assets		39								39
Total assets acquired		1,568								1,568
Current liabilities		35								35
Deferred income taxes		107								107
Other non-current liabilities		15								15
Total liabilities assumed		157								157
Net assets acquired		1,411								1,411
Cash and cash equivalents acquired		(75)								(75)
Net cash paid										1,336
Goodwill deductible from prior acquisitions		$ 15								15
Net sales										167
Operating income (loss)										8
Acquisition costs										10
Amortization of fair value adjustments to inventories and customer order backlog										7
Integration costs										2
Other 2015 Acquisitions
Acquisitions
Number of Businesses Acquired | item											3
Allocation of the purchase price
Net cash paid											$ 241
Measurement Specialties
Acquisitions
Percentage of voting interest acquired	100.00%
Per share value of the purchase (in dollars per share) | $ / shares	$ 86.00
Total transaction value	$ 1,700
Repayment of debt and accrued interest	$ 225
Allocation of the purchase price
Cash and cash equivalents						37					37
Accounts receivable						84					84
Inventories						110					110
Other current assets						20					20
Property, plant, and equipment						95					95
Goodwill						1,064					1,064
Intangible assets						547					547
Other non-current assets						9					9
Total assets acquired						1,966					1,966
Short-term debt						20					20
Accounts payable						48					48
Other current liabilities						67					67
Long-term Debt						203					203
Deferred income taxes						98					98
Other non-current liabilities						9					9
Total liabilities assumed						445					445
Net assets acquired						1,521					1,521
Cash and cash equivalents acquired						(37)					(37)
Net cash paid											1,484
Goodwill deductible from prior acquisitions						$ 23					23
Net sales											548
2014 Acquisitions
Acquisitions
Number of Businesses Acquired | item												5
Allocation of the purchase price
Net cash paid												$ 522
Measurement Specialties and 2016 Acquisitions
Pro forma financial information
Net sales										12,471	12,613	12,429
Net income										$ 2,038	$ 2,448	$ 1,744
Diluted earnings per share | $ / shares										$ 5.52	$ 5.96	$ 4.18