Segment information - Summary of Disaggregation of sales by markets (Details) - EUR (€) € in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation Of Sales By Markets [Line Items]
Revenue	€ 52,444	€ 50,724	€ 51,980
Emerging markets
Disaggregation Of Sales By Markets [Line Items]
Revenue	30,407	29,281	31,021
Developed markets
Disaggregation Of Sales By Markets [Line Items]
Revenue	€ 22,037	€ 21,443	€ 20,959

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

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+ Details