Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets

Goodwill

(Millions)	Safety and Industrial		Transportation and Electronics		Health Care		Consumer		Total Company
Balance as of December 31, 2017	$	5,077	$	1,886	$	3,317	$	233	$	10,513
Acquisition activity		7		—		—		—		7
Divestiture activity		(268)		—		(4)		—		(272)
Translation and other		(100)		(29)		(65)		(3)		(197)
Balance as of December 31, 2018		4,716		1,857		3,248		230		10,051
Acquisition activity		—		—		3,469		—		3,469
Divestiture activity		(49)		—		—		—		(49)
Translation and other		(46)		(27)		22		24		(27)
Balance as of December 31, 2019	$	4,621	$	1,830	$	6,739	$	254	$	13,444

Acquired Intangible Assets

	December 31,		December 31,
(Millions)	2019		2018
Customer related intangible assets	$	4,316	$	2,291
Patents		538		542
Other technology-based intangible assets		2,124		576
Definite-lived tradenames		1,158		664
Other amortizable intangible assets		125		125
Total gross carrying amount	$	8,261	$	4,198
Accumulated amortization — customer related		(1,180)		(998)
Accumulated amortization — patents		(499)		(487)
Accumulated amortization — other technology-based		(435)		(333)
Accumulated amortization — definite-lived tradenames		(316)		(276)
Accumulated amortization — other		(90)		(88)
Total accumulated amortization	$	(2,520)	$	(2,182)
Total finite-lived intangible assets — net	$	5,741	$	2,016
Non-amortizable intangible assets (primarily tradenames)		638		641
Total intangible assets — net	$	6,379	$	2,657

Schedule of amortization expense for acquired intangible assets

Amortization expense for the years ended December 31 follows:

(Millions)	2019		2018		2017
Amortization expense	$	341	$	249	$	238

Schedule of expected amortization expense for acquired amortizable intangible assets

Expected amortization expense for acquired amortizable intangible assets recorded as of December 31, 2019 follows:

											After
(Millions)	2020		2021		2022		2023		2024		2024
Amortization expense	$	535	$	523	$	511	$	482	$	455	$	3,200