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Debt, cash and cash equivalents and lease liabilities - Summary of Interest Rate of Net Debt at Value on Redemption (Details) - EUR (€) € in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of Interest Rate of Debt Net of Cash and Cash Equivalent [Line Items] |  |  |  |  |  |
Total debt | € 19,218 | € 20,250 | € 22,631 |  | € 24,568 |
Cash and cash equivalents | (12,736) | (10,098) | (13,915) | [1],[2] | € (9,427) | [1]
Net debt | 6,437 | 9,983 | 8,790 |  |  |
Value on redemption after derivative instruments |  |  |  |  |  |
Disclosure of Interest Rate of Debt Net of Cash and Cash Equivalent [Line Items] |  |  |  |  |  |
Total debt |  | 20,314 | 22,703 |  |  |
Cash and cash equivalents | (12,781) | (10,267) | (13,841) |  |  |
Net debt | € 6,492 | € 10,047 | € 8,862 |  |  |
Debt, percent |  | 100.00% | 100.00% |  |  |
Value on redemption after derivative instruments | Fixed-rate debt |  |  |  |  |  |
Disclosure of Interest Rate of Debt Net of Cash and Cash Equivalent [Line Items] |  |  |  |  |  |
Total debt |  | € 17,612 | € 20,713 |  |  |
Debt, percent | 85.00% | 87.00% | 91.00% |  |  |
Value on redemption after derivative instruments | Floating-rate debt |  |  |  |  |  |
Disclosure of Interest Rate of Debt Net of Cash and Cash Equivalent [Line Items] |  |  |  |  |  |
Total debt |  | € 2,702 | € 1,990 |  |  |
Debt, percent | 15.00% | 13.00% | 9.00% |  |  |
[1] | (j) Includes the impacts of the IFRIC final agenda decisions of March 2021 on the costs of configuring or customising application software used in a Software as a Service (SaaS) arrangement and of April 2021 on the attribution of benefits to periods of service, as described in Note A.2.1. to the consolidated financial statements for the year ended December 31, 2021.
[2] | Includes the impacts of the IFRIC final agenda decisions of March 2021 on the costs of configuring or customising application software used in a Software as a Service (SaaS) arrangement and of April 2021 on the attribution of benefits to periods of service, as described in Note A.2.1. to the consolidated financial statements for the year ended December 31, 2021.

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