Analysis of income and expense.

No definition available.

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- Definition

Borrowing costs capitalised credit.

+ References

No definition available.

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- Definition

Borrowing Redemption Fees

+ References

No definition available.

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- Definition

Borrowings nominal interest rate.

+ References

No definition available.

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- Definition

Expenses on factoring arrangements paid or payable.

+ References

No definition available.

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- Definition

Interest cost on pension and employee benefits.

+ References

No definition available.

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- Definition

Realized and Unrealized Exchange Gains (Losses) on Financing Activities - Net

+ References

No definition available.

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- Definition

Write Off Borrowing Costs

+ References

No definition available.

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- Definition

The amount of interest and other costs that an entity incurs in connection with the borrowing of funds that are recognised as an expense.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The weighted average of interest and other costs that an entity incurs in connection with the borrowing of funds applicable to the borrowings of the entity that are outstanding during the period, other than borrowings made specifically for the purpose of obtaining a qualifying asset. [Refer: Weighted average [member]; Borrowings]

+ References

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

The amount of costs associated with financing activities of the entity.

+ References

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

The amount of income or cost associated with interest and other financing activities of the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The gain (loss) arising from the difference between the carrying amount of the financial liability extinguished and the measurement of the consideration paid (equity instruments issued) to the creditor. [Refer: Carrying amount [member]]

+ References

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

The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]]

+ References

+ Details

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- Definition

The amount of interest expense on borrowings. [Refer: Interest expense; Borrowings]

+ References

+ Details

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- Definition

The amount of interest expense on debt instruments issued. [Refer: Interest expense; Debt instruments issued]

+ References

+ Details

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- Definition

The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

+ References

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

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

+ Details

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- Definition

The amount of finance income or cost that the entity does not separately disclose in the same statement or note. [Refer: Finance income (cost)]

+ References

+ Details

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- Definition

The cash outflow for repayments of bonds, notes and debentures.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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FINANCE COSTS—NET (Details)	1 Months Ended						12 Months Ended
FINANCE COSTS—NET (Details)	Nov. 30, 2021 EUR (€)	Nov. 30, 2021 USD ($)	Jun. 30, 2021 EUR (€)	Jun. 30, 2021 USD ($)	Feb. 28, 2021 EUR (€)	Feb. 28, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2020 EUR (€)	Dec. 31, 2019 EUR (€)	Dec. 31, 2021 USD ($)
Analysis of income and expense [line items]
Interest expense on borrowings							€ (103,000,000)	€ (122,000,000)	€ (129,000,000)
Interest expense on leases							(14,000,000)	(10,000,000)	(13,000,000)
Interest cost on pension and other benefits							(9,000,000)	(11,000,000)	(16,000,000)
Expenses on factoring arrangements							(9,000,000)	(10,000,000)	(19,000,000)
Net loss on settlement of debt							(27,000,000)	0	0
Realized and unrealized (losses) / gains on debt derivatives at fair value							10,000,000	(32,000,000)	13,000,000
Realized and unrealized exchange (losses) / gains on financing activities - net							(10,000,000)	37,000,000	(3,000,000)
Other finance expenses							(6,000,000)	(12,000,000)	(11,000,000)
Capitalized borrowing costs							1,000,000	1,000,000	3,000,000
Finance expenses							(167,000,000)	(159,000,000)	(175,000,000)
Finance costs - net							(167,000,000)	(159,000,000)	(175,000,000)
Redemption of senior notes							1,041,000,000	€ 200,000,000	€ 100,000,000
Nominal value							€ 2,128,000,000
Capitalization rate							5.00%	6.00%	6.00%
Constellium SE Senior Notes
Analysis of income and expense [line items]
Interest expense on debt instruments issued							€ 92,000,000	€ 111,000,000
Borrowing costs recognised as expense							€ 4,000,000	€ 5,000,000
Senior Unsecured Notes Issued February 2017 and due 2025
Analysis of income and expense [line items]
Redemption of senior notes					€ 536,000,000	$ 650,000,000
Nominal rate					6.625%	6.625%	6.625%
Borrowing redemption fees					€ 9,000,000
Write off borrowing costs					€ 8,000,000
Nominal value \| $										$ 650,000,000
Senior Unsecured Notes Issued May 2014 and due 2024
Analysis of income and expense [line items]
Redemption of senior notes			€ 328,000,000	$ 400,000,000
Nominal rate			5.75%	5.75%			5.75%
Borrowing redemption fees			€ 3,000,000
Write off borrowing costs			€ 3,000,000
Nominal value \| $										400,000,000
Senior Unsecured Notes Issued November 2017 and due 2026
Analysis of income and expense [line items]
Redemption of senior notes	€ 177,000,000	$ 200,000,000
Nominal rate	5.875%	5.875%					5.875%
Borrowing redemption fees	€ 3,000,000
Write off borrowing costs	€ 1,000,000
Nominal value		$ 500,000,000					€ 265,000,000			$ 300,000,000