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BORROWINGS - Borrowings by Nature (Details) |  | 1 Months Ended | 12 Months Ended | 60 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 EUR (€) | Nov. 30, 2021 EUR (€) | Nov. 30, 2021 USD ($) | Jun. 30, 2021 EUR (€) target | Jun. 30, 2021 USD ($) | Feb. 28, 2021 EUR (€) target | Feb. 28, 2021 USD ($) | Dec. 31, 2021 EUR (€) credit_facility | Dec. 31, 2020 EUR (€) | Dec. 31, 2019 EUR (€) | May 20, 2026 | Dec. 31, 2021 USD ($) credit_facility | Dec. 31, 2021 CHF (SFr) credit_facility | Jun. 30, 2021 USD ($) target | Feb. 28, 2021 USD ($) target | Jun. 30, 2020 USD ($)
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value |  |  |  |  |  |  |  | € 2,128,000,000 |  |  |  |  |  |  |  |
Gross lease liabilities |  |  |  |  |  |  |  | 182,000,000 |  |  |  |  |  |  |  |
Arrangement fees |  |  |  |  |  |  |  | (23,000,000) |  |  |  |  |  |  |  |
Accrued interests |  |  |  |  |  |  |  | 24,000,000 |  |  |  |  |  |  |  |
Accrued interest lease liabilities |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | 2,129,000,000 | € 2,391,000,000 | € 2,361,000,000 |  |  |  |  |  |
Leases |  |  |  |  |  |  |  | 183,000,000 | 195,000,000 |  |  |  |  |  |  |
Non-current borrowings |  |  |  |  |  |  |  | 1,871,000,000 | 2,299,000,000 |  |  |  |  |  |  |
Current borrowings |  |  |  |  |  |  |  | € 258,000,000 | 92,000,000 |  |  |  |  |  |  |
Number of credit facilities | credit_facility |  |  |  |  |  |  |  | 2 |  |  |  | 2 | 2 |  |  |
Redemption of senior notes |  |  |  |  |  |  |  | € 1,041,000,000 | 200,000,000 | € 100,000,000 |  |  |  |  |  |
Secured Pan-U.S. ABL (due 2026) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
Secured U.S. DDTL (expired in 2021) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
Secured French PGE French Facility (due 2022) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value |  |  |  |  |  |  |  | 180,000,000 |  |  |  | $ 180,000,000 |  |  |  |
Arrangement fees |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Accrued interests |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | € 180,000,000 | 180,000,000 |  |  |  |  |  |  |
Extension period |  |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |  |
Secured German Facility (expired 2021) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal rate |  |  |  |  |  |  |  | 2.00% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | € 0 | 0 |  |  |  |  |  |  |
Secured Inventory Facility (due 2023) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | € 0 | 0 |  |  |  |  |  |  |
Senior Unsecured Notes Issued May 2014 and due 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value | $ |  |  |  |  |  |  |  |  |  |  |  | 400,000,000 |  |  |  |
Nominal rate |  |  |  | 5.75% | 5.75% |  |  | 5.75% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | € 0 | 325,000,000 |  |  |  |  |  |  |
Redemption of senior notes |  |  |  | € 328,000,000 | $ 400,000,000 |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Notes Issued February 2017 and due 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value | $ |  |  |  |  |  |  |  |  |  |  |  | 650,000,000 |  |  |  |
Nominal rate |  |  |  |  |  | 6.625% | 6.625% | 6.625% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | € 0 | 534,000,000 |  |  |  |  |  |  |
Redemption of senior notes |  |  |  |  |  | € 536,000,000 | $ 650,000,000 |  |  |  |  |  |  |  |  |
Senior Unsecured Notes Issued November 2017 and due 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value |  |  | $ 500,000,000 |  |  |  |  | € 265,000,000 |  |  |  | 300,000,000 |  |  |  |
Nominal rate |  | 5.875% | 5.875% |  |  |  |  | 5.875% |  |  |  |  |  |  |  |
Arrangement fees |  |  |  |  |  |  |  | € (3,000,000) |  |  |  |  |  |  |  |
Accrued interests |  |  |  |  |  |  |  | 6,000,000 |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | 268,000,000 | 411,000,000 |  |  |  |  |  |  |
Redemption of senior notes |  | € 177,000,000 | $ 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Note Issued November 2017 and due 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value |  |  |  |  |  |  |  | € 400,000,000 |  |  |  |  |  |  |  |
Nominal rate |  |  |  |  |  |  |  | 4.25% |  |  |  |  |  |  |  |
Arrangement fees |  |  |  |  |  |  |  | € (4,000,000) |  |  |  |  |  |  |  |
Accrued interests |  |  |  |  |  |  |  | 6,000,000 |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | 402,000,000 | 401,000,000 |  |  |  |  |  |  |
Senior Unsecured Notes Issued June 2020 and due 2028 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value | € 290,000,000 |  |  |  |  |  |  | € 287,000,000 |  |  |  | 325,000,000 |  |  |  | $ 325,000,000
Nominal rate | 5.625% |  |  |  |  |  |  | 5.625% |  |  |  |  |  |  |  |
Arrangement fees |  |  |  |  |  |  |  | € (4,000,000) |  |  |  |  |  |  |  |
Accrued interests |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | 284,000,000 | 260,000,000 |  |  |  |  |  |  |
Senior Unsecured Notes Issued February 2021 and due 2029 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value |  |  |  |  |  | € 412,000,000 |  | € 441,000,000 |  |  |  | 500,000,000 |  |  | $ 500,000,000 |
Nominal rate |  |  |  |  |  | 3.75% | 3.75% | 3.75% |  |  |  |  |  |  |  |
Arrangement fees |  |  |  |  |  | € (7,000,000) |  | € (7,000,000) |  |  |  |  |  |  |  |
Accrued interests |  |  |  |  |  |  |  | 4,000,000 |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | 438,000,000 | 0 |  |  |  |  |  |  |
Number of sustainability performance targets | target |  |  |  |  |  | 2 |  |  |  |  |  |  |  |  | 2 |
Senior Unsecured Notes Issued February 2021 and due 2029 | Starting in April and July 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in borrowing nominal rate |  |  |  |  |  | 0.125% | 0.125% |  |  |  |  |  |  |  |  |
Senior Unsecured Notes Issued February 2021 and due 2029 | Starting in April and July 2027 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in borrowing nominal rate |  |  |  |  |  | 0.125% | 0.125% |  |  |  |  |  |  |  |  |
Senior Unsecured Notes Issued June 2021 and due 2029 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value |  |  |  |  |  |  |  | € 300,000,000 |  |  |  | $ 300,000,000 |  | $ 300,000,000 |  |
Nominal rate |  |  |  | 3.125% | 3.125% | 3.75% | 3.75% | 3.125% |  |  |  |  |  |  |  |
Arrangement fees |  |  |  | € (6,000,000) |  |  |  | € (5,000,000) |  |  |  |  |  |  |  |
Accrued interests |  |  |  |  |  |  |  | 5,000,000 |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | 300,000,000 | 0 |  |  |  |  |  |  |
Number of sustainability performance targets | target |  |  |  | 2 |  |  |  |  |  |  |  |  |  | 2 |  |
Senior Unsecured Notes Issued June 2021 and due 2029 | Starting in April and July 2026 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in borrowing nominal rate |  |  |  | 0.125% | 0.125% |  |  |  |  |  |  |  |  |  |  |
Senior Unsecured Notes Issued June 2021 and due 2029 | Starting in April and July 2027 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Increase in borrowing nominal rate |  |  |  | 0.125% | 0.125% |  |  |  |  |  |  |  |  |  |  |
Unsecured Revolving Credit Facility (expired in 2021) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | 0 | 0 |  |  |  |  |  |  |
Unsecured Swiss Facility (due 2025) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value |  |  |  |  |  |  |  | € 14,000,000 |  |  |  |  | SFr 15,000,000 |  |  |
Nominal rate |  |  |  |  |  |  |  | 1.175% |  |  |  |  |  |  |  |
Arrangement fees |  |  |  |  |  |  |  | € 0 |  |  |  |  |  |  |  |
Accrued interests |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | € 14,000,000 | 18,000,000 |  |  |  |  |  |  |
Unsecured German Facilities (expired 2021) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal rate |  |  |  |  |  |  |  | 2.12% |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | € 0 | 0 |  |  |  |  |  |  |
Other loans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal value |  |  |  |  |  |  |  | 59,000,000 |  |  |  |  |  |  |  |
Arrangement fees |  |  |  |  |  |  |  | 0 |  |  |  |  |  |  |  |
Accrued interests |  |  |  |  |  |  |  | 1,000,000 |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | 60,000,000 | € 67,000,000 |  |  |  |  |  |  |
Financing Arrangements |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  | € 41,000,000 |  |  |  |  |  |  |  |

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