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Shareholders' equity - Other Comprehensive Income reserves (Details) - EUR (€) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Reserves within equity |  |
Balance | € 51,073 | € 48,079
Balance | 47,900 | 51,073
OCI relating to equity-accounted investments | 7 |
Reserve of cash flow hedges |  |
Reserves within equity |  |
Balance | (9) | 183
Changes of the year | (1,007) | 283
Reversal to inventories adjustments | 26 | (7)
Reclassification adjustments | 525 | (468)
Balance | (465) | (9)
Reserve of cash flow hedges | Gross reserve |  |
Reserves within equity |  |
Balance | (13) | 240
Changes of the year | (1,418) | 399
Reversal to inventories adjustments | 36 | (10)
Reclassification adjustments | 739 | (642)
Balance | (656) | (13)
Reserve of cash flow hedges | Deferred tax liabilities, gross |  |
Reserves within equity |  |
Balance | 4 | (57)
Changes of the year | 411 | (116)
Reversal to inventories adjustments | (10) | 3
Reclassification adjustments | (214) | 174
Balance | 191 | 4
Reserve of remeasurements of defined benefit plans |  |
Reserves within equity |  |
Balance | (130) | (114)
Changes of the year | (44) | (17)
Foreign currency translation differences | (3) |
Change in scope of consolidation | 4 | 1
Balance | (173) | (130)
OCI relating to equity-accounted investments | 7 |
Reserve of remeasurements of defined benefit plans | Gross reserve |  |
Reserves within equity |  |
Balance | (143) | (133)
Changes of the year | (49) | (15)
Foreign currency translation differences | (3) | 1
Change in scope of consolidation | 5 | 4
Balance | (190) | (143)
Reserve of remeasurements of defined benefit plans | Deferred tax liabilities, gross |  |
Reserves within equity |  |
Balance | 13 | 19
Changes of the year | 5 | (2)
Foreign currency translation differences |  | (1)
Change in scope of consolidation | (1) | (3)
Balance | 17 | 13
Reserve of other comprehensive income on equity-accounted investments |  |
Reserves within equity |  |
Balance | 66 | 90
Changes of the year | (6) | (24)
Balance | 60 | 66
Reserve of investments valued at fair value |  |
Reserves within equity |  |
Balance | 15 |
Changes of the year | (3) | 15
Balance | € 12 | € 15

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