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Inventories (Tables)
12 Months Ended
Dec. 31, 2024
Inventories [Abstract]  
Disclosure of detailed information about inventories [Table Text Block]
Million euro2023Exchange rateConsolidation scope changesOther2024
Goods purchased for resale20 — — 26 
Raw materials and other supplies303 10 — 30 343 
Bidding and mobilization costs135 — (15)124 
Inventories458 13 — 21 492 
Million euro2022Exchange rateConsolidation scope changesOther2023
Goods purchased for resale24 — — (4)20 
Raw materials and other supplies322 — (27)303 
Bidding and mobilization costs129 (2)— 135 
Inventories476 — (23)458