Financial instruments - additional disclosures - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Disclosure of nature and extent of risks arising from financial instruments [line items]
Contingent amounts	$ 395	$ 395
Derivative assets (liabilities)	(2)	(4)
Derivative financial instruments	8	3
Current derivative financial liabilities	$ (10)	(7)
Debt at fixed interest rates	98.00%
Commodity price risk
Disclosure of nature and extent of risks arising from financial instruments [line items]
Reasonably possible change in risk variable, percent	10.00%
Interest rate risk [member]
Disclosure of nature and extent of risks arising from financial instruments [line items]
Reasonably possible change in risk variable, percent	1.00%
Reasonably possible change in risk variable, impact on loss before taxes	$ 9
Contingent consideration liabilities \| Level 3
Disclosure of nature and extent of risks arising from financial instruments [line items]
Adjustments for changes in assumptions	23	42
Payments	$ 0	$ 15
Long-term target minimum
Disclosure of nature and extent of risks arising from financial instruments [line items]
Success probability	55000000.00%	55000000.00%
Long-term target maximum
Disclosure of nature and extent of risks arising from financial instruments [line items]
Success probability	57000000.00%	80000000.00%
Significant parameters, measurement input \| Contingent consideration liabilities
Disclosure of nature and extent of risks arising from financial instruments [line items]
Percentage of possible increase in unobservable input, liabilities	10.00%
Percentage of reasonably possible decrease in unobservable input, liabilities	10.00%
Increase (decrease) in fair value due to possible increase in unobservable input, recognised in profit or loss, before tax, liabilities	$ 18
Increase (decrease) in fair value measurement due to reasonably possible decrease in unobservable input, recognised in profit or loss, before tax, liabilities	$ 18
Long-term financial investments \| Pricing, measurement input
Disclosure of nature and extent of risks arising from financial instruments [line items]
Percentage of possible increase in unobservable input, assets	10.00%
Percentage of reasonably possible decrease in unobservable input, assets	10.00%
Increase (decrease) in fair value due to increase in unobservable input, profit or loss, assets	$ 11
Increase (decrease) in fair value due to increase in unobservable input, comprehensive income, assets	11
Increase (decrease) in fair value due to decrease in unobservable input, comprehensive income, assets	11
Increase (decrease) in fair value due to decrease in unobservable input, profit or loss, assets	$ 11

Adjustments, Fair Value Measurement, Liabilities

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Borrowings, Percentage At Fixed Interest Rates

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- Definition

Contingent Amount, Business Combination

+ References

No definition available.

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- Definition

Contingent Liabilities, Success Probability

+ References

No definition available.

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- Definition

Current Derivative Financial Assets (Liabilities), Net

+ References

No definition available.

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- Definition

Payments, Fair Value Measurement, Liabilities

+ References

No definition available.

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- Definition

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Impact On Pre-Tax Earnings

+ References

No definition available.

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- Definition

Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Percent

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No definition available.

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- Definition

The amount of current derivative financial assets. [Refer: Derivative financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities]

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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.

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No definition available.

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The amount of increase (decrease) in the fair value measurement of assets, recognised in other comprehensive income before tax, due to a reasonably possible decrease in an unobservable input. [Refer: Tax income (expense)]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The amount of increase (decrease) in the fair value measurement of assets, recognised in profit or loss after tax, due to a reasonably possible decrease in an unobservable input. [Refer: Tax income (expense)]

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The amount of increase (decrease) in the fair value measurement of liabilities, recognised in profit or loss before tax, due to a reasonably possible decrease in an unobservable input. [Refer: Tax income (expense)]

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The amount of increase (decrease) in the fair value measurement of assets, recognised in other comprehensive income before tax, due to a reasonably possible increase in an unobservable input. [Refer: Tax income (expense)]

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The amount of increase (decrease) in the fair value measurement of assets, recognised in profit or loss after tax, due to a reasonably possible increase in an unobservable input. [Refer: Tax income (expense)]

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The amount of increase (decrease) in the fair value measurement of liabilities, recognised in profit or loss before tax, due to a reasonably possible increase in an unobservable input. [Refer: Tax income (expense)]

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- Definition

The percentage of a reasonably possible decrease in an unobservable input used in fair value measurement of assets.

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The percentage of a reasonably possible decrease in an unobservable input used in fair value measurement of liabilities.

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The percentage of a reasonably possible increase in an unobservable input used in fair value measurement of liabilities.

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