Quarterly report pursuant to Section 13 or 15(d)

Other Intangible Assets, Net

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Other Intangible Assets, Net
 9 Months Ended
Sep. 30, 2018
Other Intangible Assets [Abstract]  
Intangible assets disclosure
Other Intangible Assets, Net
Other intangible assets consisted of the following:
 
September 30, 2018
 
December 31, 2017
 
(in millions)
Gross
cost

Accumulated
amortization

Other intangible assets, net

Gross
cost

Accumulated
amortization

Other intangible assets, net

Purchased and internally developed software
$
758

(607
)
151

710

(548
)
162

Affiliate and customer relationships
2,412

(2,405
)
7

2,419

(2,409
)
10

Debt origination fees
8

(4
)
4

8

(3
)
5

Trademarks (indefinite life)
2,428

—

2,428

2,428

—

2,428


$
5,606

(3,016
)
2,590

5,565

(2,960
)
2,605


The Company recorded amortization expense of $24 million and $52 million for the three months ended September 30, 2018 and 2017, respectively, related to other intangible assets. For the nine months ended September 30, 2018 and 2017, amortization expense for other intangible assets was $69 million and $183 million, respectively. The decrease in amortization expense for each period is primarily due to the end of affiliation agreement terms for contracts in place at the time of Qurate Retail's acquisition of QVC in 2003.
As of September 30, 2018, the related amortization and interest expense for each of the next five years ended December 31 was as follows (in millions):
Remainder of 2018
$
25

2019
76

2020
44

2021
17

2022
—