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Assets held for sale and divestitures - Narrative (Details) - Disposal group, held-for-sale, not discontinued operations - Lime operations - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2024	Nov. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration		$ 1,100
Gain (loss) on disposal	$ 115
Disposal group, including discontinued operation, assets	67
Disposal group, including discontinued operation, liabilities	$ 14

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Amount classified as assets attributable to disposal group held for sale or disposed of.

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