Off balance sheet commitments and lease contracts - Leases (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Lease contracts
Minimum lease payments for exempted lease contracts	$ 2,221	$ 1,830	$ 1,679
Minimum lease payments for leases recorded in balance sheet	13,801	13,276	12,516
Less financial expenses	(4,324)	(3,562)	(3,482)
Total lease liabilities	9,477	9,714	9,034
Less current portion of lease contracts	(1,721)	(1,437)	(1,390)
NON-CURRENT LEASE LIABILITIES	7,756	8,277	7,644
Rental expense
Rental expense incurred under short term leases or low value assets leases	1,007	701	487
Rental expense incurred under variable lease payments	183	151	242
Not later than one year
Lease contracts
Minimum lease payments for exempted lease contracts	643	783	689
Minimum lease payments for leases recorded in balance sheet	2,473	2,189	1,835
Total lease liabilities	1,721	1,437	1,390
Year 2
Lease contracts
Minimum lease payments for exempted lease contracts	406	190	194
Minimum lease payments for leases recorded in balance sheet	1,607	1,646	1,347
Year 3
Lease contracts
Minimum lease payments for exempted lease contracts	249	154	136
Minimum lease payments for leases recorded in balance sheet	1,384	1,255	1,199
Year 4
Lease contracts
Minimum lease payments for exempted lease contracts	231	137	111
Minimum lease payments for leases recorded in balance sheet	1,142	1,140	1,097
Year 5
Lease contracts
Minimum lease payments for exempted lease contracts	163	129	102
Minimum lease payments for leases recorded in balance sheet	1,007	993	1,021
More than 5 years
Lease contracts
Minimum lease payments for exempted lease contracts	529	437	447
Minimum lease payments for leases recorded in balance sheet	6,188	6,053	6,017
Total lease liabilities	$ 4,104	$ 4,405	$ 4,323

The amount of current lease liabilities. [Refer: Lease liabilities]

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The amount of the expense relating to variable lease payments not included in the measurement of lease liabilities. Variable lease payments are the portion of payments made by a lessee to a lessor for the right to use an underlying asset during the lease term that varies because of changes in facts or circumstances occurring after the commencement date, other than the passage of time. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amount of contractual undiscounted cash flows in relation to lease liabilities before deducting finance charges. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

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The amount of non-current lease liabilities. [Refer: Lease liabilities]

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- Definition

Disclosure of lease contracts

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Amount of rental expense incurred under short term leases or low value assets leases.

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- Definition

Future finance expenses on leases.

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- Definition

Lease commitments for leases for which recognition exemption has been used

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- Definition

Rental expense

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