Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying value of goodwill by operating segment

Changes in the carrying value of goodwill by reportable segment during the years ended December 31, 2020 and 2019 are as follows:

(in millions)	Water Infrastructure		Applied Water		Measurement & Control Solutions		Total
Balance as of December 31, 2018	$	653	$	516	$	1,807	$	2,976
Activity in 2019
Acquired	—		—		19		19
Impairment	—		—		(148)		(148)
Foreign currency and other	(2)		(3)		(3)		(8)
Balance as of December 31, 2019	$	651	$	513	$	1,675	$	2,839
Activity in 2020
Impairment	—		—		(58)		(58)
Foreign currency and other	17		16		40		73
Balance as of December 31, 2020	$	668	$	529	$	1,657	$	2,854

Other Intangible Assets

Information regarding our other intangible assets is as follows:

(in millions)	December 31, 2020						December 31, 2019
	Carrying Amount		Accumulated Amortization		Net Intangibles		Carrying Amount		Accumulated Amortization		Net Intangibles
Customer and distributor relationships	$	941	$	(410)	$	531	$	945	$	(352)	$	593
Proprietary technology and patents	206		(131)		75		204		(111)		93
Trademarks	143		(63)		80		148		(52)		96
Software	500		(265)		235		428		(206)		222
Other	21		(18)		3		20		(16)		4
Indefinite-lived intangibles	169		—		169		166		—		166
Other intangibles	$	1,980	$	(887)	$	1,093	$	1,911	$	(737)	$	1,174

Estimated Amortization Expense

Estimated amortization expense for each of the five succeeding years is as follows:

(in millions)
2021	$	128
2022	121
2023	115
2024	105
2025	102