Intangible Assets

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets

Intangible Assets

	December 31, 2019				December 31, 2018
(In millions)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Definite-lived intangibles
Customer relationships	$	1,875	$	784	$	1,891	$	640
Trade name	51		51		52		52
Non-compete agreements	16		15		16		14
	$	1,942	$	850	$	1,959	$	706

We recorded a non-cash, pre-tax charge of $6 million in 2019 related to the impairment of customer relationships intangibles associated with exiting our direct postal injection business. For 2018 and 2017, we did not recognize any impairment of our identified intangible assets.

Estimated future amortization expense for amortizable intangible assets for the next five years is as follows:

(In millions)	2020		2021		2022		2023		2024		Thereafter
Estimated amortization expense	$	145	$	137	$	127	$	110	$	106	$	467

Actual amounts of amortization expense may differ from estimated amounts due to changes in foreign currency exchange rates, additional intangible asset acquisitions, future impairment of intangible assets, accelerated amortization of intangible assets and other events.

Intangible asset amortization expense recorded in SG&A was $156 million, $159 million and $164 million for the years ended December 31, 2019, 2018 and 2017, respectively.