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Note 21 Condensed statements of cash flows of companies held for sale in the USA subsidiary (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Condensed statements of cash flows of companies held for sale in the USA subsidiary [Line Items]      
Effect of exchange rate changes on cash and cash equivalents € (288) € (1,864) € (4,658)
Sold USA subsidiary [Member]      
Condensed statements of cash flows of companies held for sale in the USA subsidiary [Line Items]      
Cash flows from (used in) operating activities, continuing operations   62 [1] 6,874
Cash flows from (used in) investing activities, continuing operations   (34) [1] (145)
Cash flows from (used in) financing activities, continuing operations   (26) [1] (65)
Effect of exchange rate changes on cash and cash equivalents   60 [1] (974)
Increase (decrease) in cash and cash equivalents   € 62 € 5,690
[1] (1) Corresponds to the first five months of 2021 (See Note 3).