Assets held for sale, liabilities of disposal groups held for sale and business acquisitions - Assets and liabilities held for sale (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Non-current Assets Held For Sale And Discontinued Operations [Abstract]
Disposal groups	$ 27,126	$ 115,836
Unallocated impairment losses	(31)	(1,975)
Non-current assets held for sale	139	273
Assets held for sale	27,234	114,134
Liabilities of disposal groups held for sale	$ 29,011	$ 108,406

Non-current Assets Held For Sale And Discontinued Operations [Abstract]

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- Definition

Non Current Assets Or Disposal Groups Classified As Held For Sale, Disposal Groups

+ References

No definition available.

+ Details

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- Definition

Non Current Assets Or Disposal Groups Classified As Held For Sale, Disposal Groups, Impairment Loss

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No definition available.

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- Definition

Non Current Assets Or Disposal Groups Classified As Held For Sale, Noncurrent Assets

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No definition available.

+ Details

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- Definition

The amount of liabilities included in disposal groups classified as held for sale. [Refer: Liabilities; Disposal groups classified as held for sale [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount of non-current assets or disposal groups classified as held for sale. [Refer: Disposal groups classified as held for sale [member]]

+ References

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