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Equity - Reserves for Other Comprehensive Income (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Reserves within equity |  |
Balance | € 47,900 | € 51,073
Balance | 37,493 | 47,900
Reserve for OCI on cash flow hedge derivatives |  |
Reserves within equity |  |
Balance | (465) | (9)
Changes of the year | (199) | (1,007)
Reversal to inventories adjustments | (9) | 26
Reclassification adjustments | 668 | 525
Balance | (5) | (465)
Reserve for OCI on cash flow hedge derivatives | Gross reserve |  |
Reserves within equity |  |
Balance | (656) | (13)
Changes of the year | (280) | (1,418)
Reversal to inventories adjustments | (12) | 36
Reclassification adjustments | 941 | 739
Balance | (7) | (656)
Reserve for OCI on cash flow hedge derivatives | Deferred tax liabilities, gross |  |
Reserves within equity |  |
Balance | 191 | 4
Changes of the year | 81 | 411
Reversal to inventories adjustments | 3 | (10)
Reclassification adjustments | (273) | (214)
Balance | 2 | 191
Reserve for OCI on defined benefit plans |  |
Reserves within equity |  |
Balance | (173) | (130)
Changes of the year | 9 | (44)
Foreign currency translation differences | (1) | (3)
Change in scope of consolidation |  | 4
Balance | (165) | (173)
OCI relating to equity-accounted investments | (7) | (7)
Reserve for OCI on defined benefit plans | Gross reserve |  |
Reserves within equity |  |
Balance | (190) | (143)
Changes of the year | (16) | (49)
Foreign currency translation differences | (6) | (3)
Change in scope of consolidation |  | 5
Balance | (212) | (190)
Reserve for OCI on defined benefit plans | Deferred tax liabilities, gross |  |
Reserves within equity |  |
Balance | 17 | 13
Changes of the year | 25 | 5
Foreign currency translation differences | 5 |
Change in scope of consolidation |  | (1)
Balance | 47 | 17
Reserve for OCI equity-accounted investments |  |
Reserves within equity |  |
Balance | 60 | 66
Changes of the year | 32 | (6)
Balance | 92 | 60
Reserve for OCI on Investments fair value |  |
Reserves within equity |  |
Balance | 12 | 15
Changes of the year | 24 | (3)
Balance | € 36 | € 12

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