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Segments and Geographic Information Segment and Geographic Information ( Revenue by Segment) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
Jun. 30, 2024
Jun. 30, 2024
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Segment Reporting, Revenue Reconciling Item [Line Items]              
Revenues $ 3,289 $ 2,942 $ 6,027 $ 9,316 $ 12,278 $ 12,668 $ 12,617
Total Adjusted EBITDA         2,672 2,808 2,955
Income from continuing operations before taxes         868 72 (240)
Depreciation, Amortization and Accretion, Net         (1,264) (1,147) (1,072)
Corporate and Other              
Segment Reporting, Revenue Reconciling Item [Line Items]              
Reconciliation to income from continuing operations before taxes         11 22 (19)
Intersegment Eliminations              
Segment Reporting, Revenue Reconciling Item [Line Items]              
Revenues         (241) (216) 116
Segment Reporting, Other Segment Item, Amount         (44) (2) 13
Operating Segments [Member]              
Segment Reporting, Revenue Reconciling Item [Line Items]              
Revenues         12,357 12,746 12,717
Operating Segments [Member] | Corporate and Other              
Segment Reporting, Revenue Reconciling Item [Line Items]              
Revenues         162 138  
Operating Segments [Member] | Renewables              
Segment Reporting, Revenue Reconciling Item [Line Items]              
Revenues         2,510 2,339 1,893
Total cost of sales excluding depreciation, amortization, and accretion of AROs (1)         1,752 1,504 1,097
Total Adjusted EBITDA         552 652 613
Segment Reporting, Other Segment Item, Amount         206 183 183
Operating Segments [Member] | Utilities              
Segment Reporting, Revenue Reconciling Item [Line Items]              
Revenues         3,608 3,495 3,617
Total cost of sales excluding depreciation, amortization, and accretion of AROs (1)         2,607 2,662 2,861
Total Adjusted EBITDA         792 678 612
Segment Reporting, Other Segment Item, Amount         209 155 144
Operating Segments [Member] | Energy Infrastructure              
Segment Reporting, Revenue Reconciling Item [Line Items]              
Revenues         6,238 6,836 7,204
Total cost of sales excluding depreciation, amortization, and accretion of AROs (1)         4,568 5,022 5,249
Total Adjusted EBITDA         1,366 1,540 1,846
Segment Reporting, Other Segment Item, Amount         304 274 109
Operating Segments [Member] | New Energy Technologies              
Segment Reporting, Revenue Reconciling Item [Line Items]              
Revenues         1 76 3
Total cost of sales excluding depreciation, amortization, and accretion of AROs (1)         8 84 8
Total Adjusted EBITDA         (38) (62) (116)
Segment Reporting, Other Segment Item, Amount         $ 31 $ 54 111
Operating Segments [Member] | Eliminations              
Segment Reporting, Revenue Reconciling Item [Line Items]              
Revenues             $ (216)