v3.26.1
PROVISIONS - Narrative (Details)
Mar. 31, 2026
Commitments and Contingencies Disclosure [Abstract]
Provisions, expected settlement, period
40 years
X
- Definition
Provisions, Expected Settlement, Period
+ References
No definition available.
+ Details
Name:
cstm_ProvisionsExpectedSettlementPeriod
Namespace Prefix:
cstm_
Data Type:
xbrli:durationItemType
Balance Type:
na
Period Type:
instant
X
- References
No definition available.
+ Details
Name:
us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:
us-gaap_
Data Type:
xbrli:stringItemType
Balance Type:
na
Period Type:
duration