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Fair Value Measurements Table - Fair Value of Financial Assets and Liabilities (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Price Risk Derivative Assets, at Fair Value $ 366 $ 610
Other Assets, Fair Value Disclosure 34 31
Assets, Fair Value Disclosure 400 647
Interest Rate Derivative Liabilities, at Fair Value   (4)
Price Risk Derivative Liabilities, at Fair Value (318) (460)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (318) (464)
Interest Rate Derivative Assets, at Fair Value   6
Level 1    
Price Risk Derivative Assets, at Fair Value 360 602
Other Assets, Fair Value Disclosure 23 20
Assets, Fair Value Disclosure 383 622
Interest Rate Derivative Liabilities, at Fair Value   0
Price Risk Derivative Liabilities, at Fair Value (315) (460)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (315) (460)
Interest Rate Derivative Assets, at Fair Value   0
Level 2    
Price Risk Derivative Assets, at Fair Value 6 8
Other Assets, Fair Value Disclosure 11 11
Assets, Fair Value Disclosure 17 25
Interest Rate Derivative Liabilities, at Fair Value   (4)
Price Risk Derivative Liabilities, at Fair Value (3) 0
Financial and Nonfinancial Liabilities, Fair Value Disclosure (3) (4)
Interest Rate Derivative Assets, at Fair Value   6
Commodity Derivatives - Natural Gas [Member] | Basis Swaps IFERC/NYMEX [Member]    
Price Risk Derivative Assets, at Fair Value 5 24
Price Risk Derivative Liabilities, at Fair Value (10) (3)
Commodity Derivatives - Natural Gas [Member] | Swing Swaps IFERC [Member]    
Price Risk Derivative Assets, at Fair Value 6 20
Price Risk Derivative Liabilities, at Fair Value (4) (2)
Commodity Derivatives - Natural Gas [Member] | Fixed Swaps/Futures [Member]    
Price Risk Derivative Assets, at Fair Value 11 77
Price Risk Derivative Liabilities, at Fair Value (6) (16)
Commodity Derivatives - Natural Gas [Member] | Forward Physical Contracts [Member]    
Price Risk Derivative Assets, at Fair Value 6 8
Price Risk Derivative Liabilities, at Fair Value (3)  
Commodity Derivatives - Natural Gas [Member] | Put Option [Member]    
Price Risk Derivative Liabilities, at Fair Value   (2)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Basis Swaps IFERC/NYMEX [Member]    
Price Risk Derivative Assets, at Fair Value 5 24
Price Risk Derivative Liabilities, at Fair Value (10) (3)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Swing Swaps IFERC [Member]    
Price Risk Derivative Assets, at Fair Value 6 20
Price Risk Derivative Liabilities, at Fair Value (4) (2)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Fixed Swaps/Futures [Member]    
Price Risk Derivative Assets, at Fair Value 11 77
Price Risk Derivative Liabilities, at Fair Value (6) (16)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Forward Physical Contracts [Member]    
Price Risk Derivative Assets, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value 0  
Commodity Derivatives - Natural Gas [Member] | Level 1 | Put Option [Member]    
Price Risk Derivative Liabilities, at Fair Value   (2)
Commodity Derivatives - Natural Gas [Member] | Level 2 | Basis Swaps IFERC/NYMEX [Member]    
Price Risk Derivative Assets, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value 0 0
Commodity Derivatives - Natural Gas [Member] | Level 2 | Swing Swaps IFERC [Member]    
Price Risk Derivative Assets, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value 0 0
Commodity Derivatives - Natural Gas [Member] | Level 2 | Fixed Swaps/Futures [Member]    
Price Risk Derivative Assets, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value 0 0
Commodity Derivatives - Natural Gas [Member] | Level 2 | Forward Physical Contracts [Member]    
Price Risk Derivative Assets, at Fair Value 6 8
Price Risk Derivative Liabilities, at Fair Value (3)  
Commodity Derivatives - Natural Gas [Member] | Level 2 | Put Option [Member]    
Price Risk Derivative Liabilities, at Fair Value   0
Commodity Derivatives - Refined Products [Member] | Future [Member]    
Price Risk Derivative Assets, at Fair Value 5 35
Price Risk Derivative Liabilities, at Fair Value (6) (18)
Commodity Derivatives - Refined Products [Member] | Level 1 | Future [Member]    
Price Risk Derivative Assets, at Fair Value 5 35
Price Risk Derivative Liabilities, at Fair Value (6) (18)
Commodity Derivatives - Refined Products [Member] | Level 2 | Future [Member]    
Price Risk Derivative Assets, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value 0 0
Commodity Derivatives - Crude [Member] | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 19 45
Price Risk Derivative Liabilities, at Fair Value (31) (37)
Commodity Derivatives - Crude [Member] | Level 1 | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 19 45
Price Risk Derivative Liabilities, at Fair Value (31) (37)
Commodity Derivatives - Crude [Member] | Level 2 | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value 0 0
Commodity Derivatives - Power [Member] | Future [Member]    
Price Risk Derivative Assets, at Fair Value 10 8
Price Risk Derivative Liabilities, at Fair Value (8) (8)
Commodity Derivatives - Power [Member] | Forward Contracts    
Price Risk Derivative Assets, at Fair Value 45 57
Price Risk Derivative Liabilities, at Fair Value (44) (56)
Commodity Derivatives - Power [Member] | Level 1 | Future [Member]    
Price Risk Derivative Assets, at Fair Value 10 8
Price Risk Derivative Liabilities, at Fair Value (8) (8)
Commodity Derivatives - Power [Member] | Level 1 | Forward Contracts    
Price Risk Derivative Assets, at Fair Value 45 57
Price Risk Derivative Liabilities, at Fair Value (44) (56)
Commodity Derivatives - Power [Member] | Level 2 | Future [Member]    
Price Risk Derivative Assets, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value 0 0
Commodity Derivatives - Power [Member] | Level 2 | Forward Contracts    
Price Risk Derivative Assets, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value 0 0
Commodity Derivatives - NGLs [Member] | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 259 336
Price Risk Derivative Liabilities, at Fair Value (206) (316)
Commodity Derivatives - NGLs [Member] | Put Option [Member]    
Price Risk Derivative Liabilities, at Fair Value   (1)
Commodity Derivatives - NGLs [Member] | Call Option [Member]    
Price Risk Derivative Liabilities, at Fair Value   (1)
Commodity Derivatives - NGLs [Member] | Level 1 | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 259 336
Price Risk Derivative Liabilities, at Fair Value (206) (316)
Commodity Derivatives - NGLs [Member] | Level 1 | Put Option [Member]    
Price Risk Derivative Liabilities, at Fair Value   (1)
Commodity Derivatives - NGLs [Member] | Level 1 | Call Option [Member]    
Price Risk Derivative Liabilities, at Fair Value   (1)
Commodity Derivatives - NGLs [Member] | Level 2 | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value $ 0 0
Commodity Derivatives - NGLs [Member] | Level 2 | Put Option [Member]    
Price Risk Derivative Liabilities, at Fair Value   0
Commodity Derivatives - NGLs [Member] | Level 2 | Call Option [Member]    
Price Risk Derivative Liabilities, at Fair Value   $ 0