Wireless Licenses, Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Carrying Amount of Wireless Licenses

The carrying amounts of Wireless licenses are as follows:

	At March 31,		At December 31,
(dollars in millions)	2020		2019
Wireless licenses	$	92,471	$	95,059

Changes in Carrying Amount of Goodwill

Changes in the carrying amount of Goodwill are as follows:

(dollars in millions)	Consumer		Business			Other		Total
Balance at January 1, 2020 (1)	$	17,104	$	7,269		$	16	$	24,389
Reclassifications, adjustments and other	—		(7		)	—		(7		)
Balance at March 31, 2020 (1)	$	17,104	$	7,262		$	16	$	24,382

⁽¹⁾ Goodwill is net of accumulated impairment charges of $4.8 billion, related to our Media reporting unit.

Composition of Other Intangible Assets, Net

The following table displays the composition of Other intangible assets, net as well as the respective amortization period:

	At March 31, 2020							At December 31, 2019
(dollars in millions)	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Customer lists (8 to 13 years)	$	3,894	$	(1,624	)	$	2,270	$	3,896	$	(1,511	)	$	2,385
Non-network internal-use software (3 to 7 years)	20,971		(14,842		)	6,129		20,530		(14,418		)	6,112
Other (2 to 25 years)	1,969		(997		)	972		1,967		(966		)	1,001
Total	$	26,834	$	(17,463	)	$	9,371	$	26,393	$	(16,895	)	$	9,498

Amortization Expense for Other Intangible Assets

The amortization expense for Other intangible assets was as follows: 

	Three Months Ended
(dollars in millions)	March 31,
2020	$	592
2019	555

Estimated Future Amortization Expense for Other Intangible Assets

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 2020	$	1,714
2021	2,004
2022	1,715
2023	1,368
2024	1,017
2025	660