Intangible Assets (Tables)

12 Months Ended

Sep. 30, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

Components of Intangible Assets

Intangible assets at September 30 consisted of:

	2017				2016
(Millions of dollars)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Amortized intangible assets
Customer relationships	$	3,393	$	564	$	3,360	$	339
Developed technology	3,508		1,029		3,409		754
Product rights	131		54		125		43
Trademarks	408		65		405		45
Patents and other	370		274		349		254
Amortized intangible assets	$	7,811	$	1,986	$	7,648	$	1,435
Unamortized intangible assets
Acquired in-process research and development	$	67			$	66
Trademarks	2				2
Unamortized intangible assets	$	69			$	68

Reconciliation of Goodwill by Business Segment

The following is a reconciliation of goodwill by business segment:

(Millions of dollars)	Medical			Life Sciences		Total
Goodwill as of September 30, 2015	$	6,807		$	730	$	7,537
Divestiture (A)	(32		)	—		(32		)
Purchase accounting adjustments (B)	(79		)	1		(78		)
Currency translation	(8		)	—		(8		)
Goodwill as of September 30, 2016	$	6,688		$	731	$	7,419
Acquisitions (C)	119			24		143
Divestiture (A)	(25		)	—		(25		)
Purchase accounting adjustments	4			—		4
Currency translation	16			6		22
Goodwill as of September 30, 2017	$	6,802		$	761	$	7,563

(A) Represents goodwill derecognized upon the Company's sale of a 50.1% controlling financial interest in the Respiratory Solutions business, as further discussed in Note 10.

(B) Primarily represents $94 million resulting from adjustments to the deferred tax liability accounts recorded upon the Company's acquisition of CareFusion.

(C) Represents goodwill recognized upon the Company's acquisitions during the current year. Such acquisitions were not material individually or in the aggregate.