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Fair Value Measurements Table - Fair Value of Financial Assets and Liabilities (Details) - Fair Value, Recurring [Member] - Level 1 - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Price Risk Derivative Assets, at Fair Value $ 369 $ 263
Other Assets, Fair Value Disclosure 211 212
Assets, Fair Value Disclosure 580 475
Price Risk Derivative Liabilities, at Fair Value (404) (293)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (404) (293)
Commodity Derivatives - Natural Gas [Member] | Basis Swaps IFERC/NYMEX [Member]    
Price Risk Derivative Assets, at Fair Value 9 6
Price Risk Derivative Liabilities, at Fair Value (25) (11)
Commodity Derivatives - Natural Gas [Member] | Swing Swaps IFERC [Member]    
Price Risk Derivative Assets, at Fair Value 2 4
Price Risk Derivative Liabilities, at Fair Value (2) (11)
Commodity Derivatives - Natural Gas [Member] | Fixed Swaps/Futures [Member]    
Price Risk Derivative Assets, at Fair Value 15 10
Price Risk Derivative Liabilities, at Fair Value (45) (9)
Commodity Derivatives - Refined Products [Member] | Future [Member]    
Price Risk Derivative Assets, at Fair Value 2 3
Price Risk Derivative Liabilities, at Fair Value (11) (9)
Commodity Derivatives - Crude [Member] | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 17 25
Price Risk Derivative Liabilities, at Fair Value (27) (35)
Commodity Derivatives - Power [Member] | Future [Member]    
Price Risk Derivative Assets, at Fair Value 16 10
Price Risk Derivative Liabilities, at Fair Value (15) (10)
Commodity Derivatives - Power [Member] | Forward Contracts    
Price Risk Derivative Assets, at Fair Value 37 39
Price Risk Derivative Liabilities, at Fair Value (34) (38)
Commodity Derivatives - NGLs [Member] | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 271 166
Price Risk Derivative Liabilities, at Fair Value $ (245) $ (170)