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Debt, Cash and Cash Equivalents - Summary of Reconciliation of Carrying Amount to Value on Redemption (Details) - EUR (€) € in Millions | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022 | Dec. 31, 2021
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Disclosure of reconciliation of carrying amount to value on redemption [line items] |  |  |  |
Long-term debt | € 14,241 | € 14,857 |  |
Short-term debt and current portion of long-term debt | 4,694 | 4,174 |  |
Interest rate and currency derivatives used to manage debt | 205 | 187 |  |
Total debt | 19,140 | 19,218 |  |
Cash and cash equivalents | (7,993) | (12,736) | € (6,899) | € (10,098)
Interest rate and currency derivatives used to manage cash and cash equivalents | 36 | (45) |  |
Net debt | 11,183 | 6,437 |  |
Lease liabilities | 2,092 | 2,181 |  |
Amortized cost |  |  |  |
Disclosure of reconciliation of carrying amount to value on redemption [line items] |  |  |  |
Long-term debt | 45 |  |  |
Short-term debt and current portion of long-term debt |  |  |  |
Interest rate and currency derivatives used to manage debt |  |  |  |
Total debt | 45 |  |  |
Cash and cash equivalents |  |  |  |
Interest rate and currency derivatives used to manage cash and cash equivalents |  |  |  |
Net debt | 45 |  |  |
Adjustment to debt measured at fair value |  |  |  |
Disclosure of reconciliation of carrying amount to value on redemption [line items] |  |  |  |
Long-term debt | 228 |  |  |
Short-term debt and current portion of long-term debt |  |  |  |
Interest rate and currency derivatives used to manage debt | (239) |  |  |
Total debt | (11) |  |  |
Cash and cash equivalents |  |  |  |
Interest rate and currency derivatives used to manage cash and cash equivalents |  |  |  |
Net debt | (11) |  |  |
Value on redemption |  |  |  |
Disclosure of reconciliation of carrying amount to value on redemption [line items] |  |  |  |
Long-term debt | 14,514 | 15,143 |  |
Short-term debt and current portion of long-term debt | 4,694 | 4,178 |  |
Interest rate and currency derivatives used to manage debt | (34) | (48) |  |
Total debt | 19,174 | 19,273 |  |
Cash and cash equivalents | (7,993) | (12,736) |  |
Interest rate and currency derivatives used to manage cash and cash equivalents | 36 | (45) |  |
Net debt | € 11,217 | € 6,492 |  |

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