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Segments and Geographic Information Segment and Geographic Information (Assets, Depreciation and Amortization and Capital Expenditures ) (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 Information [Line Items]              
Total Assets $ 50,265 $ 47,915 $ 47,915 $ 50,265 $ 47,406 $ 44,799 $ 38,363
Depreciation and Amortization     620 926 1,264 1,147 1,072
Capital Expenditures         7,519 7,733 4,584
Interest Income 119 88 193 312 381 551 389
Interest Expense 379 389 746 1,125 1,485 1,319 1,117
Long-Lived Assets         33,538 30,338 23,395
Assets, Current 10,712 9,732 9,732 10,712 6,831 6,649 7,643
Restricted Cash, Noncurrent         78 194 177
Goodwill 348 348 348 348 345 348 362
Other intangible assets, net of accumulated amortization of $426 and $498, respectively 1,928 1,879 1,879 1,928 1,947 2,243 1,841
Other noncurrent assets, excluding ROU assets for operating leases         2,545 2,879 3,674
Deferred Tax Assets, Tax Deferred Expense 421 435 435 421 365 396 319
Net equity in losses of affiliates (9) 3 (12) (21) (26) (32) (71)
Disposal Group, Including Discontinued Operation, Assets, Noncurrent $ 670 $ 712 $ 712 $ 670 633 811 0
Depreciation, Amortization and Accretion, Net         (1,264) (1,147) (1,072)
Depreciation expense         1,146 1,045 982
Accretion Expense, Including Asset Retirement Obligations         22 16 18
Operating Segments [Member] | Renewables              
Segment Reporting Information [Line Items]              
Total Assets         17,028 15,735 9,533
Depreciation and Amortization         401 345 268
Capital Expenditures         5,170 5,759 2,972
Interest Income         109 181 131
Interest Expense         414 326 236
Goodwill         318 318  
Net equity in losses of affiliates         19 41 28
Operating Segments [Member] | Utilities              
Segment Reporting Information [Line Items]              
Total Assets         8,535 7,166 6,311
Depreciation and Amortization         458 400 376
Capital Expenditures         1,570 1,374 859
Interest Income         12 12 8
Interest Expense         294 243 234
Goodwill         0 0  
Net equity in losses of affiliates         4 5 6
Operating Segments [Member] | Energy Infrastructure              
Segment Reporting Information [Line Items]              
Total Assets         7,928 7,414 7,532
Depreciation and Amortization         397 392 416
Capital Expenditures         733 585 742
Interest Income         233 337 246
Interest Expense         483 534 488
Goodwill         27 27  
Net equity in losses of affiliates         10 6 9
Operating Segments [Member] | New Energy Technologies              
Segment Reporting Information [Line Items]              
Total Assets         22 14 2
Depreciation and Amortization         1 1 2
Capital Expenditures         11 5 0
Interest Income         7 2 0
Interest Expense         0 0 0
Goodwill         0 3  
Net equity in losses of affiliates         (20) (84) (114)
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] | Corporate and Other              
Segment Reporting Information [Line Items]              
Total Assets         25 9 17
Depreciation and Amortization         7 9 10
Capital Expenditures         35 10 11
Interest Income         20 19 4
Interest Expense         294 216 159
Net equity in losses of affiliates         $ (39) $ 0 $ 0