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PARENT COMPANY INFORMATION - Statement of Cash Flows of Constellium SE (parent company only) (Details) - EUR (€) € in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of condensed financial information of parent company [line items] |  |  |  |
Net income |  | € 262 | € (17) | € 64
Adjustments |  |  |  |
Finance costs - net |  | 167 | 159 | 175
Income tax benefit |  | 55 | (17) | 18
Change in working capital |  |  |  |
Trade receivables and other |  | (227) | 36 | 104
Trade payables and other |  | 396 | (38) | (31)
Interest paid |  | (128) | (140) | (158)
Income tax received |  | 3 | 9 | (6)
Net cash flows from operating activities |  | 357 | 334 | 447
Net cash flows used in investing activities |  | (221) | (176) | (353)
Proceeds from issuance of Senior Notes | € 290 | 712 | 290 | 0
Repayments of Senior Notes |  | (1,041) | (200) | (100)
Net cash flows (used in) / from financing activities |  | (435) | 101 | (76)
Net (decrease) / increase in cash and cash equivalents |  | (299) | 259 | 18
Cash and cash equivalents - beginning of period | 184 | 439 | 184 | 164
Cash and cash equivalents - end of year |  | 147 | 439 | 184
Parent |  |  |  |
Disclosure of condensed financial information of parent company [line items] |  |  |  |
Net income |  | 16 | 32 | 37
Adjustments |  |  |  |
Finance costs - net |  | (7) | (31) | (41)
Dividends received |  | 0 | 0 | 0
Income tax benefit |  | (26) | (15) | (18)
Change in working capital |  |  |  |
Trade receivables and other |  | 0 | (2) | 27
Trade payables and other |  | 1 | 0 | 2
Interest paid |  | (100) | (114) | (115)
Interest received |  | 114 | 139 | 143
Income tax received |  | 7 | 18 | 50
Net cash flows from operating activities |  | 5 | 27 | 85
Investments in subsidiaries |  | 0 | 0 | 0
Current account with subsidiaries and related parties |  | 3 | 29 | (135)
Loans granted to subsidiaries and related parties |  | (892) | (290) | 0
Repayment of loans granted to subsidiaries and related parties |  | 1,241 | 150 | 150
Net cash flows used in investing activities |  | 352 | (111) | 15
Proceeds from issuance of Senior Notes |  | 712 | 290 | 0
Repayments of Senior Notes |  | (1,041) | (200) | (100)
Payment of exit fees |  | (15) | 0 | 0
Payment of deferred financing costs |  | (13) | (6) | 0
Realized foreign exchange gains / (losses) |  | 0 | 0 | 0
Net cash flows (used in) / from financing activities |  | (357) | 84 | (100)
Net (decrease) / increase in cash and cash equivalents |  | 0 | 0 | 0
Cash and cash equivalents - beginning of period | € 0 | 0 | 0 | 0
Cash and cash equivalents - end of year |  | € 0 | € 0 | € 0

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