Wireless Licenses, Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2017

Changes in the carrying amount of Wireless licenses are as follows:


	(dollars in millions)
Balance at January 1, 2017	$	86,673
Acquisitions (Note 2)		76
Capitalized interest on wireless licenses		121
Reclassifications, adjustments and other		884

Balance at March 31, 2017	$	87,754

Changes in the carrying amount of Goodwill are as follows:


(dollars in millions)	Wireless		Wireline		Other		Total
Balance at January 1, 2017	$	18,393	$	3,784	$	5,028	$	27,205
Acquisitions (Note 2)		–		418		2		420
Reclassifications, adjustments and other		–		3		2		5

Balance at March 31, 2017	$	18,393	$	4,205	$	5,032	$	27,630

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


	At March 31, 2017							At December 31, 2016
(dollars in millions)	Gross Amount		Accumulated Amortization			Net Amount		Gross Amount		Accumulated Amortization			Net Amount
Customer lists (8 to 10 years)	$	3,163	$	(548	)	$	2,615	$	2,884	$	(480	)	$	2,404
Non-network internal-use software (5 to 7 years)		16,459		(11,251	)		5,208		16,135		(10,913	)		5,222
Other (6 to 25 years)		1,707		(618	)		1,089		1,854		(583	)		1,271

Total	$	21,329	$	(12,417	)	$	8,912	$	20,873	$	(11,976	)	$	8,897

The amortization expense for Other intangible assets was as follows:

The estimated future amortization expense for Other intangible assets is as follows: