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Rights of Use - Gross Costs, Accumulated Depreciation, and Impairment Losses of Rights of Use (Details) - EUR (€) € in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | € 8,279 | € 7,579 | € 4,982
Rights of use on land and natural properties |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | 885 | 793 | 762
Buildings |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | 4,130 | 3,561 | 2,819
Rights of use on plant and machinery |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | 3,037 | 3,024 | 1,238
Other rights of use |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | 227 | 201 | € 163
Gross cost |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | 15,005 | 12,112 |
Gross cost | Rights of use on land and natural properties |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | 1,923 | 1,491 |
Gross cost | Buildings |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | 8,053 | 6,214 |
Gross cost | Rights of use on plant and machinery |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | 4,560 | 4,003 |
Gross cost | Other rights of use |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | 469 | 404 |
Accumulated depreciation |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | (6,726) | (4,533) |
Accumulated depreciation | Rights of use on land and natural properties |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | (1,038) | (698) |
Accumulated depreciation | Buildings |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | (3,923) | (2,653) |
Accumulated depreciation | Rights of use on plant and machinery |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | (1,523) | (979) |
Accumulated depreciation | Other rights of use |  |  |
Disclosure of quantitative information about right-of-use assets [line items] |  |  |
Rights of use | € (242) | € (203) |

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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2022-03-24 -Paragraph 53 -Subparagraph j -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_53_j&doctype=Standard -URIDate 2022-03-24 + Details
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