v3.26.3
Supplemental financial information - Schedule of Comprehensive Income (Details) - USD ($)
$ in Thousands
 3 Months Ended 4 Months Ended 5 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2025
May 23, 2025
Sep. 30, 2026
Sep. 30, 2025
Disclosure of subsidiaries [line items]            
Net income $ 188,858 $ 644,124 $ 1,238,439 $ 556,334 $ 334,273 $ 1,794,773
Items that are or may be subsequently reclassified to statement of income:            
Gain on foreign currency translation adjustments (31,106) 82,131     298,823 1,049,377
Gain (loss) on cash flow hedge (1,747) (826)     260 (865)
Deferred income tax on gain (loss) on cash flow hedge (262) (22)     553 (74)
Other fair value adjustments through other comprehensive income 0 (344) (355) (25) 0 (380)
Items that are or may be subsequently reclassified to statement of income:            
Gain (loss) on foreign currency translation adjustments 2,080 (2,228)     1,067 (1,823)
Gain (loss) on cash flow hedge (426) 683     (109) 737
Total other comprehensive income (loss) (31,461) 79,394     300,594 1,046,972
Items that will not be reclassified to statement of income: 157,397 723,518     634,867 2,841,745
Gains associated with pension and other postretirement benefit obligations 0 0     0 0
Total comprehensive income attributable to:            
Company shareholders 129,110 671,031     590,129 2,811,376
Non-controlling interest 28,287 52,487     44,738 30,369
Comprehensive income 157,397 723,518 $ 1,707,985 $ 1,133,760 634,867 2,841,745
Reportable Legal Entities | Restricted subsidiaries            
Disclosure of subsidiaries [line items]            
Net income 73,329 302,078     104,970 803,135
Items that are or may be subsequently reclassified to statement of income:            
Gain on foreign currency translation adjustments (32,389) 123,086     351,552 765,375
Gain (loss) on cash flow hedge (1,747) 985     260 (2,088)
Deferred income tax on gain (loss) on cash flow hedge (262) (22)     553 (74)
Other fair value adjustments through other comprehensive income 0 (344)     0 (380)
Items that are or may be subsequently reclassified to statement of income:            
Gain (loss) on foreign currency translation adjustments 799 (291)     742 (395)
Gain (loss) on cash flow hedge (426) 683     (109) 737
Total other comprehensive income (loss) (34,025) 124,097     352,998 763,175
Items that will not be reclassified to statement of income: 39,304 426,175     457,968 1,566,310
Gains associated with pension and other postretirement benefit obligations 118,093 297,343     176,899 1,275,435
Total comprehensive income attributable to:            
Company shareholders 149,257 723,966     620,628 3,038,138
Non-controlling interest 8,140 (448)     14,239 (196,393)
Comprehensive income 157,397 723,518     634,867 2,841,745
Reportable Legal Entities | Unrestricted subsidiaries            
Disclosure of subsidiaries [line items]            
Net income 115,529 342,046     229,303 991,638
Items that are or may be subsequently reclassified to statement of income:            
Gain on foreign currency translation adjustments 1,283 (40,955)     (52,729) 284,002
Gain (loss) on cash flow hedge 0 (1,811)     0 1,223
Deferred income tax on gain (loss) on cash flow hedge 0 0     0 0
Other fair value adjustments through other comprehensive income 0 0     0 0
Items that are or may be subsequently reclassified to statement of income:            
Gain (loss) on foreign currency translation adjustments 1,281 (1,937)     325 (1,428)
Gain (loss) on cash flow hedge 0 0     0 0
Total other comprehensive income (loss) 2,564 (44,703)     (52,404) 283,797
Items that will not be reclassified to statement of income: 118,093 297,343     176,899 1,275,435
Gains associated with pension and other postretirement benefit obligations 0 0     0 0
Total comprehensive income attributable to:            
Company shareholders 97,946 244,408     146,400 1,048,673
Non-controlling interest 20,147 52,935     30,499 226,762
Comprehensive income 118,093 297,343     176,899 1,275,435
Eliminations            
Disclosure of subsidiaries [line items]            
Net income 0 0     0 0
Items that are or may be subsequently reclassified to statement of income:            
Gain on foreign currency translation adjustments 0     0
Gain (loss) on cash flow hedge 0     0
Deferred income tax on gain (loss) on cash flow hedge 0     0
Other fair value adjustments through other comprehensive income 0     0
Items that are or may be subsequently reclassified to statement of income:            
Gain (loss) on foreign currency translation adjustments 0 0     0 0
Gain (loss) on cash flow hedge 0     0
Total other comprehensive income (loss) 0 0     0 0
Items that will not be reclassified to statement of income: 0 0     0 0
Gains associated with pension and other postretirement benefit obligations (118,093) (297,343)     (176,899) (1,275,435)
Total comprehensive income attributable to:            
Company shareholders (118,093) (297,343)     (176,899) (1,275,435)
Non-controlling interest 0 0     0 0
Comprehensive income $ (118,093) $ (297,343)     $ (176,899) $ (1,275,435)