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Long-term investments - Footnote Narrative (Details) - USD ($)
$ in Thousands
Dec. 12, 2024
Dec. 31, 2024
Dec. 11, 2024
Dec. 31, 2023
Regulated Services Group        
Schedule of Equity Method Investments [Line Items]        
Noncontrolling interest in partnerships and joint ventures   $ 38,113   $ 112,680
Regulated Services Group | Variable Interest Entity, Not Primary Beneficiary        
Schedule of Equity Method Investments [Line Items]        
Net assets   $ 0   $ 73,737
Atlantica        
Schedule of Equity Method Investments [Line Items]        
Equity interest (percent)     42.00% 42.00%
Proceeds from sale of its stake in Atlantica $ 1,077,184      
Regulated Services Group | Regulated Services Group        
Schedule of Equity Method Investments [Line Items]        
Equity interest (percent)   9.80%    
San Antonio Water System        
Schedule of Equity Method Investments [Line Items]        
Aggregate cost   $ 25,634   $ 25,634