Costs and expenses by nature (Details 1) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Costs And Expenses By Nature
Personnel	$ 252	$ 266	$ 243
Services	159	161	154
Depreciation and amortization	72	56	47
Other	158	139	109
Total	$ 641	$ 622	$ 553

The amount of expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'nature of expense' form for its analysis of expenses. [Refer: Expenses, by nature]

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