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Segmental information - Additional Information (Details) - United States - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Disclosure of reportable segments [line items]
Tangible fixed assets	$ 294	$ 307
Property, plant and equipment
Disclosure of reportable segments [line items]
Tangible fixed assets	93	99
Right-of-use assets
Disclosure of reportable segments [line items]
Tangible fixed assets	$ 201	$ 208

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The amount of property, plant and equipment including right-of-use assets whose underlying assets would be presented as property, plant and equipment if they were owned. [Refer: Property, plant and equipment; Right-of-use assets]

+ References

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