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Property, plant and equipment - Unproved mineral interests (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Property, plant and equipment    
Property, plant and equipment - beginning of the year € 53,943 € 62,192
Additions 4,950 4,407
Currency translation differences 3,688 (4,140)
Property, plant and equipment - end of the year 56,299 53,943
Unproved mineral interest    
Property, plant and equipment    
Property, plant and equipment - beginning of the year 1,763 2,162
Additions 9 57
Net (impairments) reversals 35 (196)
Reclassification to Proved Mineral Interest (141) (90)
Currency translation differences 153 (170)
Property, plant and equipment - end of the year 1,819 1,763
Unproved mineral interest | Congo    
Property, plant and equipment    
Property, plant and equipment - beginning of the year 203 253
Net (impairments) reversals (1) (25)
Currency translation differences 16 (25)
Property, plant and equipment - end of the year 218 203
Unproved mineral interest | Nigeria    
Property, plant and equipment    
Property, plant and equipment - beginning of the year 860 939
Reclassification to Proved Mineral Interest (48)  
Currency translation differences 80 (79)
Property, plant and equipment - end of the year 892 860
Unproved mineral interest | Turkmenistan    
Property, plant and equipment    
Property, plant and equipment - beginning of the year   139
Net (impairments) reversals 3 (134)
Reclassification to Proved Mineral Interest   (2)
Currency translation differences   (3)
Property, plant and equipment - end of the year 3  
Unproved mineral interest | United States of America    
Property, plant and equipment    
Property, plant and equipment - beginning of the year 114 162
Additions 3  
Net (impairments) reversals 35 (37)
Reclassification to Proved Mineral Interest (92)  
Currency translation differences 8 (11)
Property, plant and equipment - end of the year 68 114
Unproved mineral interest | Algeria    
Property, plant and equipment    
Property, plant and equipment - beginning of the year 100 115
Additions 6 55
Reclassification to Proved Mineral Interest   (61)
Currency translation differences 8 (9)
Property, plant and equipment - end of the year 114 100
Unproved mineral interest | Egypt    
Property, plant and equipment    
Property, plant and equipment - beginning of the year 18 19
Additions   2
Net (impairments) reversals (2)  
Reclassification to Proved Mineral Interest (1) (2)
Currency translation differences 1 (1)
Property, plant and equipment - end of the year 16 18
Unproved mineral interest | United Arab Emirates    
Property, plant and equipment    
Property, plant and equipment - beginning of the year 468 535
Reclassification to Proved Mineral Interest   (25)
Currency translation differences 40 (42)
Property, plant and equipment - end of the year € 508 € 468