The amount of current tax for current and prior periods to the extent unpaid. Current tax is the amount of income taxes payable (recoverable) in respect of the taxable profit (tax loss) for a period.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 54
-Subparagraph n
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_n&doctype=Standard
-URIDate 2024-03-27

CONTINGENCIES (Details) zł in Millions, R$ in Millions, $ in Millions	1 Months Ended											6 Months Ended
	Apr. 30, 2025 USD ($) charge	Oct. 31, 2024 USD ($)	Jul. 31, 2024	Jan. 31, 2023 USD ($)	Sep. 30, 2022 USD ($)	Feb. 28, 2019 USD ($)	Jan. 31, 2019	Nov. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Apr. 30, 2016 USD ($)	May 31, 2014 USD ($)	Jun. 30, 2025 USD ($) employee	Jul. 31, 2025 USD ($)	Oct. 31, 2024 PLN (zł)	Nov. 30, 2023 USD ($)	Jan. 31, 2023 BRL (R$)	Sep. 30, 2022 BRL (R$)
ArcelorMittal Comercializadora de Energia
Disclosure of contingent liabilities [line items]
Damages sought										$ 57	$ 39
Loss contingency, reduction in damages sought						$ 7		$ 12
ArcelorMittal Comercializadora de Energia \| Minimum
Disclosure of contingent liabilities [line items]
Percentage tax value, penalties		100.00%												100.00%
ArcelorMittal Brasil S.A.
Disclosure of contingent liabilities [line items]
Reduced VAT rate			0.18
State VAT Rate			0.28
ArcelorMittal Brasil S.A. \| The 2028 Tax Year
Disclosure of contingent liabilities [line items]
Loss contingency, tax penalty sought				$ 16
Loss contingency, tax penalty sought, percentage of assessment				0.50
Other non-current liabilities, income taxes payable															$ 60
ArcelorMittal Brasil S.A. \| Value added taxation
Disclosure of contingent liabilities [line items]
Damages sought												$ 75
Reduced VAT rate							0.18
State VAT Rate							0.28
ArcelorMittal Brasil S.A. \| Other legal claims and contingencies
Disclosure of contingent liabilities [line items]
Damages sought									$ 55
Arbitration claim					$ 1,067
Exercise price, put option				$ 26	$ 179											R$ 144	R$ 5,825
ArcelorMittal Brasil S.A. \| Other legal claims and contingencies \| Forecast
Disclosure of contingent liabilities [line items]
Settlement amount													$ 546
Tax settlement payment period													3 years
ArcelorMittal Brasil S.A. \| Other legal claims and contingencies \| SINDIMETAL case
Disclosure of contingent liabilities [line items]
Number of employees impacted \| employee												2,500
Loss contingency, potential recovery amount												$ 72
ArcelorMittal Las Truchas \| Tax claims
Disclosure of contingent liabilities [line items]
Current tax liabilities	$ 75
Tauron Polska Energia S.A \| Poland \| Tameh Holding
Disclosure of contingent liabilities [line items]
Exercise price, put option		$ 165												zł 598
Proportion of ownership interest in joint venture		50.00%
ArcelorMittal Canada Inc
Disclosure of contingent liabilities [line items]
Number of environmental charges \| charge	200