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Fair value of financial instruments (Tables)
 9 Months Ended
Sep. 30, 2025
Fair Value Disclosures [Abstract]  
Schedule of fair value of financial instruments measured at amortized cost
The carrying values and estimated fair values of certain of our financial instruments as of the dates specified were as follows:

September 30, 2025December 31, 2024
(In $ millions)Fair
value		Carrying
value		Fair
value		Carrying
value
Liabilities
$575 million secured bond (Level 1)
597 562 587 560 
Unsecured senior convertible bond - debt component (Level 3)
56 50 56 50