XML 396 R122.htm IDEA: XBRL DOCUMENT
v3.24.1

FINANCIAL RISK MANAGEMENT - Impact on Profit and Equity (Before Tax Effect) of a 10% Strengthening of US Dollar Versus Euro for US Dollar Functional Currency Entities (Details) - 10% strengthening U.S. Dollar/Euro € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 EUR (€)
Disclosure of nature and extent of risks arising from financial instruments [line items] |
Effect on net income | € 2
Effect on equity | € 84

X
- Definition Foreign exchange sensitivity effect on pretax equity. + References No definition available. + Details
Name: | cstm_ForeignExchangeSensitivityEffectOnPretaxEquity
Namespace Prefix: | cstm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Foreign exchange sensitivity effect on profit before tax. + References No definition available. + Details
Name: | cstm_ForeignExchangeSensitivityEffectOnProfitBeforeTax
Namespace Prefix: | cstm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- 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. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfNatureAndExtentOfRisksArisingFromFinancialInstrumentsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | cstm_SensitivityAnalysisAxis=cstm_TenPercentageStrengtheningUsDollarEuroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |