v3.26.1
Property, Plant and Equipment, Net - EGTS (Details) - EGTS
$ in Millions
1 Months Ended 3 Months Ended
Jan. 31, 2026
USD ($)
a
Sep. 30, 2025
USD ($)
a
Mar. 31, 2026
USD ($)
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
Property, Plant and Equipment [Line Items]          
Utility plant in-service     $ 7,587   $ 7,505
Accumulated depreciation and amortization     (2,862)   (2,824)
Plant, net     4,725   4,681
Construction work-in-progress     236   228
Property, plant and equipment, net     4,961   4,909
Oil and gas, developed acreage | a 7,600 23,000      
Development rights, payment amount   $ 49      
Development rights, payment period   3 years      
Proceeds from assignment of shale development rights $ 16   16 $ 0  
Shale development rights gain 16        
Shale development rights, gain after-tax $ 12        
Interstate natural gas transmission assets          
Property, Plant and Equipment [Line Items]          
Utility plant in-service     $ 5,271   5,213
Interstate natural gas transmission assets | Minimum          
Property, Plant and Equipment [Line Items]          
Depreciable life     47 years    
Interstate natural gas transmission assets | Maximum          
Property, Plant and Equipment [Line Items]          
Depreciable life     51 years    
Storage assets          
Property, Plant and Equipment [Line Items]          
Utility plant in-service     $ 1,896   1,884
Storage assets | Minimum          
Property, Plant and Equipment [Line Items]          
Depreciable life     47 years    
Storage assets | Maximum          
Property, Plant and Equipment [Line Items]          
Depreciable life     51 years    
Intangible plant and other assets          
Property, Plant and Equipment [Line Items]          
Utility plant in-service     $ 420   $ 408
Intangible plant and other assets | Minimum          
Property, Plant and Equipment [Line Items]          
Depreciable life     12 years    
Intangible plant and other assets | Maximum          
Property, Plant and Equipment [Line Items]          
Depreciable life     53 years