Intangible Assets, net
The following tables present the detail of intangible assets as of the dates presented (in millions):
 December 31, 2023
 CostAccumulated
Amortization
Net
Customer relationships$98 $(19)$79 
Developed technology
104 (30)74 
Software
84 (29)55 
Trade names and trademarks47 (20)27 
Purchased content
17 (11)
Total$350 $(109)$241 

 December 31, 2022
 CostAccumulated
Amortization
Net
Customer relationships$59 $(10)$49 
Software
54 (15)39 
Developed technology
49 (15)34 
Trade names and trademarks
45 (15)30 
Purchased content(6)
Total$215 $(61)$154 

Amortization expense recorded for intangible assets for the years ended December 31, 2023, 2022 and 2021 was $53 million, $58 million and $56 million, respectively.
Estimated future amortization expense for intangible assets, including amortization related to future commitments (see Note 16), as of December 31, 2023 is as follows (in millions):
2024$73 
202561 
202644 
202735 
2028
16 
Thereafter24 
Total future amortization expense$253 
We did not record any material impairment costs related to our intangible assets for the years ended December 31, 2023, 2022 or 2021.

Historical Timeline

Fiscal YearFiled
2023Feb 15, 2024Showing above
2022Feb 15, 2023
2021Feb 10, 2022
2020Feb 12, 2021
2019Feb 19, 2020
2018Feb 21, 2019
2017Feb 15, 2018
2016Feb 7, 2017
2015Feb 12, 2016

About Goodwill & Intangibles Disclosures

Goodwill and intangible asset disclosures reveal the premium paid in acquisitions and how management assesses whether that premium retains its value. Since goodwill is no longer amortized under US GAAP, the annual impairment test is the only mechanism that adjusts carrying values downward — making the assumptions behind that test critically important for investors.

Key signals: a history of goodwill impairments suggests management consistently overpays for acquisitions. Watch the gap between reporting unit fair value and carrying amount — when fair value exceeds carrying amount by less than 10-20%, a small decline in business performance could trigger a write-down. For finite-lived intangibles, examine useful life assumptions across customer relationships, technology, and trade names; aggressive estimates inflate near-term earnings. Compare total intangibles-to-total-assets ratios against peers to assess acquisition dependency. Rising goodwill as a percentage of equity can signal balance sheet fragility.