Goodwill and Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2019

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		—		—		517		—		517
Translation and other		(9)		(8)		(11)		34		6
Balance as of June 30, 2019	$	4,707	$	1,849	$	3,754	$	264	$	10,574

Acquired Intangible Assets

	June 30,		December 31,
(Millions)	2019		2018
Customer related intangible assets	$	2,565	$	2,291
Patents		540		542
Other technology-based intangible assets		738		576
Definite-lived tradenames		674		664
Other amortizable intangible assets		125		125
Total gross carrying amount	$	4,642	$	4,198
Accumulated amortization — customer related		(1,075)		(998)
Accumulated amortization — patents		(494)		(487)
Accumulated amortization — other technology-based		(368)		(333)
Accumulated amortization — definite-lived tradenames		(293)		(276)
Accumulated amortization — other		(89)		(88)
Total accumulated amortization	$	(2,319)	$	(2,182)
Total finite-lived intangible assets — net	$	2,323	$	2,016
Non-amortizable intangible assets (primarily tradenames)		641		641
Total intangible assets — net	$	2,964	$	2,657

Schedule of amortization expense for acquired intangible assets

Amortization expense for the three and six months ended June 30, 2019 and 2018 follows:

	Three months ended				Six months ended
	June 30,				June 30,
(Millions)	2019		2018		2019		2018
Amortization expense	$	70	$	63	$	139	$	127

Schedule of expected amortization expense for acquired amortizable intangible assets

Expected amortization expense for acquired amortizable intangible assets recorded as of June 30, 2019:

	Remainder of												After
(Millions)	2019		2020		2021		2022		2023		2024		2024
Amortization expense	$	145	$	276	$	267	$	253	$	222	$	191	$	969