Wireless Licenses, Goodwill and Other Intangible Assets

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Wireless Licenses, Goodwill and Other Intangible Assets

Note 4. Wireless Licenses, Goodwill, and Other Intangible Assets

Wireless Licenses

The carrying amounts of Wireless licenses are as follows:

At March 31, 2019 and 2018, approximately $7.2 billion and $13.6 billion, respectively, of wireless licenses were under development for commercial service for which we were capitalizing interest costs. We recorded approximately $88 million and $124 million of capitalized interest on wireless licenses for the three months ended March 31, 2019 and 2018, respectively.

The average remaining renewal period of our wireless licenses portfolio was 4.4 years as of March 31, 2019.

Goodwill

In November 2018, we announced a strategic reorganization of our business. As discussed in Note 1, the Company began reporting externally under the new structure as of April 1, 2019. The below table relates to the previous reporting structure in effect as of March 31, 2019.

Changes in the carrying amount of Goodwill are as follows:



(dollars in millions)	Historical Wireless		Historical Wireline		Historical Other		Total
Balance at January 1, 2019 ⁽¹⁾	$	18,397	$	3,871	$	2,346	$	24,614
Acquisitions (Note 3)	—		20		—		20
Reclassifications, adjustments and other	—		1		—		1
Balance at March 31, 2019 ⁽¹⁾	$	18,397	$	3,892	$	2,346	$	24,635

⁽¹⁾Goodwill is net of accumulated impairment charge of $4.6 billion, related to our Media reporting unit (included within Historical Other in the table above), which was recorded in the fourth quarter of 2018.

Other Intangible Assets

The following table displays the composition of Other intangible assets, net:



	At March 31, 2019							At December 31, 2018
(dollars in millions)	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Customer lists (8 to 13 years)	$	3,953	$	(1,213	)	$	2,740	$	3,951	$	(1,121	)	$	2,830
Non-network internal-use software (3 to 7 years)	18,958		(13,192		)	5,766		18,603		(12,785		)	5,818
Other (2 to 25 years)	1,999		(897		)	1,102		1,988		(861		)	1,127
Total	$	24,910	$	(15,302	)	$	9,608	$	24,542	$	(14,767	)	$	9,775

The amortization expense for Other intangible assets was as follows:



	Three Months Ended
(dollars in millions)	March 31,
2019	$	555
2018	534

The estimated future amortization expense for Other intangible assets for the remainder of the current year and next 5 years is as follows:



Years	(dollars in millions)
Remainder of 2019	$	1,603
2020	1,837
2021	1,544
2022	1,276
2023	1,004
2024	749

At March 31,

At December 31,

(dollars in millions)

Wireless licenses