Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Intangible Assets

Goodwill

	Dec. 31,		2016		2016		Dec. 31,		2017		2017		2017		Dec. 31,
	2015		acquisition		translation		2016		acquisition		divestiture		translation		2017
(Millions)	Balance		activity		and other		Balance		activity		activity		and other		Balance
Industrial	$	2,573	$	—	$	(37)	$	2,536	$	—	$	—	$	142	$	2,678
Safety and Graphics		3,342		41		(59)		3,324		1,296		(323)		122		4,419
Health Care		1,624		12		(27)		1,609		6		—		67		1,682
Electronics and Energy		1,510		—		(21)		1,489		—		—		35		1,524
Consumer		200		—		8		208		—		—		2		210
Total Company	$	9,249	$	53	$	(136)	$	9,166	$	1,302	$	(323)	$	368	$	10,513

Acquired Intangible Assets

	December 31,		December 31,
(Millions)	2017		2016
Customer related intangible assets	$	2,332	$	1,939
Patents		561		602
Other technology-based intangible assets		583		524
Definite-lived tradenames		678		420
Other amortizable intangible assets		207		211
Total gross carrying amount	$	4,361	$	3,696
Accumulated amortization — customer related		(874)		(797)
Accumulated amortization — patents		(489)		(497)
Accumulated amortization — other technology based		(292)		(302)
Accumulated amortization — definite-lived tradenames		(256)		(236)
Accumulated amortization — other		(162)		(173)
Total accumulated amortization	$	(2,073)	$	(2,005)
Total finite-lived intangible assets — net	$	2,288	$	1,691
Non-amortizable intangible assets (primarily tradenames)		648		629
Total intangible assets — net	$	2,936	$	2,320

Schedule of amortization expense for acquired intangible assets

Amortization expense for the years ended December 31 follows:

(Millions)	2017		2016		2015
Amortization expense	$	238	$	262	$	229

Schedule of expected amortization expense for acquired amortizable intangible assets

Expected amortization expense for acquired amortizable intangible assets recorded as of December 31, 2017 follows:

											After
(Millions)	2018		2019		2020		2021		2022		2022
Amortization expense	$	252	$	242	$	231	$	221	$	208	$	1,134