Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets

Goodwill

(Millions)	Safety and Industrial		Transportation and Electronics		Health Care		Consumer		Total Company
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
Acquisition activity		—		—		(34)		—		(34)
Divestiture activity		—		(10)		(19)		—		(29)
Translation and other		66		38		306		11		421
Balance as of December 31, 2020	$	4,687	$	1,858	$	6,992	$	265	$	13,802

Acquired Intangible Assets

	December 31,		December 31,
(Millions)	2020		2019
Customer related intangible assets	$	4,280	$	4,316
Patents		537		538
Other technology-based intangible assets		2,114		2,124
Definite-lived tradenames		1,178		1,158
Other amortizable intangible assets		104		125
Total gross carrying amount	$	8,213	$	8,261
Accumulated amortization — customer related		(1,422)		(1,180)
Accumulated amortization — patents		(512)		(499)
Accumulated amortization — other technology-based		(638)		(435)
Accumulated amortization — definite-lived tradenames		(385)		(316)
Accumulated amortization — other		(79)		(90)
Total accumulated amortization	$	(3,036)	$	(2,520)
Total finite-lived intangible assets — net	$	5,177	$	5,741
Non-amortizable intangible assets (primarily tradenames)		658		638
Total intangible assets — net	$	5,835	$	6,379

Schedule of amortization expense for acquired intangible assets

Amortization expense for the years ended December 31 follows:

(Millions)	2020		2019		2018
Amortization expense	$	537	$	341	$	249

Schedule of expected amortization expense for acquired amortizable intangible assets

Expected amortization expense for acquired amortizable intangible assets recorded as of December 31, 2020 follows:

											After
(Millions)	2021		2022		2023		2024		2025		2025
Amortization expense	$	528	$	515	$	488	$	459	$	428	$	2,759