v3.25.1
Segment Information - Summarized Segment Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Segment Reporting Information [Line Items]      
Operating revenues $ 1,142 $ 1,011  
Operation and maintenance 468 416  
Other segment items 66 65  
Depreciation and amortization 216 188  
Interest expense 144 124  
Interest income (22) (24)  
Provision for income taxes 65 57  
Net income attributable to common shareholders 205 185  
Total assets 33,156 31,086 $ 32,830
Cash paid for capital expenditures 548 609  
Other      
Segment Reporting Information [Line Items]      
Operating revenues 93 83  
Operation and maintenance 73 65  
Other segment items (1) 4  
Depreciation and amortization 3 4  
Interest expense 30 27  
Interest income (21) (21)  
Provision for income taxes 5 4  
Net income attributable to common shareholders 4 0  
Total assets 2,868 3,279  
Cash paid for capital expenditures 3 6  
Regulated Businesses | Operating Segments      
Segment Reporting Information [Line Items]      
Operating revenues 1,049 928  
Operation and maintenance 395 351  
Other segment items 67 61  
Depreciation and amortization 213 184  
Interest expense 114 97  
Interest income (1) (3)  
Provision for income taxes 60 53  
Net income attributable to common shareholders 201 185  
Total assets 30,288 27,807  
Cash paid for capital expenditures $ 545 $ 603