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Intangible Assets
 9 Months Ended
Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets Intangible Assets
 September 30, 2025
 CostAccumulated amortizationNet book value
(in US $ millions)
Acquired technology92 60 32 
Other intangible assets5 4 1 
Software development costs14 14 — 
 111 78 33 
 December 31, 2024
 CostAccumulated amortizationNet book value
(in US $ millions)
Acquired technology72 51 21 
Other intangible assets5 4 1 
Software development costs14 14 — 
 91 69 22 
The following table illustrates the classification of amortization expense related to intangible assets in the condensed consolidated statements of operations and comprehensive income:
Three months ended September 30,Nine months ended September 30,
 2025202420252024
(in US $ millions)
Cost of revenues2 3 6 11 
Research and development1 1 3 1 
 3 4 9 12 
Estimated future amortization expense related to intangible assets, as of September 30, 2025 is as follows:
Fiscal Year 
Amount
(in US $ millions)
20253 
20269 
20278 
Thereafter2 
Total22