v3.26.1
Note 12 - Intangible assets, net - Intangible Assets and Goodwill (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year $ 1,357,749 $ 1,377,110
Movements of the year    
Currency translation adjustment 1,026 (358)
Increase due to business combinations [1] 1,324  
Changes due to business combinations [2]   (28,211)
Additions 48,762 58,443
Transfers / Reclassifications (906) 4,546
Disposals (15) (31)
Amortization charge (50,824) (53,750)
Movements of the year (633) (19,361)
At the end of the year 1,357,116 1,357,749
Information system projects [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year 97,106 72,165
Movements of the year    
Currency translation adjustment 880 (285)
Increase due to business combinations [1]  
Changes due to business combinations [2]  
Additions 37,449 43,445
Transfers / Reclassifications (906) 4,476
Disposals (15) (31)
Amortization charge (30,036) (22,664)
Movements of the year 7,372 24,941
At the end of the year 104,478 97,106
Licenses, patents and trademarks [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year [3] 159,296 153,332
Movements of the year    
Currency translation adjustment [3] 7 (4)
Increase due to business combinations [1],[3]  
Changes due to business combinations [2],[3]  
Additions [3] 11,313 14,998
Transfers / Reclassifications [3] 70
Disposals [3]
Amortization charge [3] (9,460) (9,100)
Movements of the year [3] 1,860 5,964
At the end of the year [3] 161,156 159,296
Goodwill [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year 1,090,019 1,103,707
Movements of the year    
Currency translation adjustment 139 (67)
Increase due to business combinations [1] 1,324  
Changes due to business combinations [2]   (13,621)
Additions
Transfers / Reclassifications
Disposals
Amortization charge
Movements of the year 1,463 (13,688)
At the end of the year 1,091,482 1,090,019
Customer-related intangible assets [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year 11,328 47,906
Movements of the year    
Currency translation adjustment (2)
Increase due to business combinations [1]  
Changes due to business combinations [2]   (14,590)
Additions
Transfers / Reclassifications
Disposals
Amortization charge (11,328) (21,986)
Movements of the year (11,328) (36,578)
At the end of the year 11,328
Gross carrying amount [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year 5,487,942 5,488,497
Movements of the year    
At the end of the year 5,531,425 5,487,942
Gross carrying amount [member] | Information system projects [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year 661,605 648,887
Movements of the year    
At the end of the year 692,274 661,605
Gross carrying amount [member] | Licenses, patents and trademarks [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year [3] 575,607 560,549
Movements of the year    
At the end of the year [3] 586,938 575,607
Gross carrying amount [member] | Goodwill [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year 2,474,693 2,488,381
Movements of the year    
At the end of the year 2,476,156 2,474,693
Gross carrying amount [member] | Customer-related intangible assets [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year 1,776,037 1,790,680
Movements of the year    
At the end of the year 1,776,057 1,776,037
Accumulated depreciation, amortisation and impairment [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year (4,130,193) (4,111,387)
Movements of the year    
At the end of the year (4,174,309) (4,130,193)
Accumulated depreciation, amortisation and impairment [member] | Information system projects [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year (564,499) (576,722)
Movements of the year    
At the end of the year (587,796) (564,499)
Accumulated depreciation, amortisation and impairment [member] | Licenses, patents and trademarks [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year [3] (416,311) (407,217)
Movements of the year    
At the end of the year [3] (425,782) (416,311)
Accumulated depreciation, amortisation and impairment [member] | Goodwill [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year (1,384,674) (1,384,674)
Movements of the year    
At the end of the year (1,384,674) (1,384,674)
Accumulated depreciation, amortisation and impairment [member] | Customer-related intangible assets [member]    
Reconciliation of changes in intangible assets and goodwill [abstract]    
At the beginning of the year (1,764,709) (1,742,774)
Movements of the year    
At the end of the year $ (1,776,057) $ (1,764,709)
[1] For the year 2025, related to the acquisition of a scrap processing business in Beaver Falls, Pennsylvania. For more information see note 34.
[2] For the year 2024, related to Mattr’s pipe coating business unit acquisition.
[3] Includes Proprietary Technology.