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Fair value of financial instruments
 9 Months Ended
Sep. 30, 2025
Fair Value Disclosures [Abstract]  
Fair value of financial instruments Fair value of financial instruments
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 
Financial instruments categorized as level 1
The fair value of the $575 million secured bond is based on market traded value.
Financial instruments categorized as level 3
The fair value attributed to the unsecured senior convertible bond was bifurcated into two elements: the straight debt component was derived through a discounted cash flow approach, and the conversion option was derived through an option pricing model. The conversion option was recorded in equity at the point the bond was issued and, therefore, has not been included in the table above.
Our cash and cash equivalents, restricted cash, accounts receivable and accounts payable are by their nature short-term. As a result, the carrying values included in our unaudited Condensed Consolidated Balance Sheets approximate fair value.