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Fair Value Measurements Table - Fair Value of Financial Assets and Liabilities (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Price Risk Derivative Assets, at Fair Value $ 361 $ 688
Other Assets, Fair Value Disclosure 28 27
Assets, Fair Value Disclosure 389 715
Interest Rate Derivative Liabilities, at Fair Value (43) (23)
Price Risk Derivative Liabilities, at Fair Value (309) (526)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (352) (549)
Level 1    
Price Risk Derivative Assets, at Fair Value 310 626
Other Assets, Fair Value Disclosure 18 18
Assets, Fair Value Disclosure 328 644
Interest Rate Derivative Liabilities, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value (263) (473)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (263) (473)
Level 2    
Price Risk Derivative Assets, at Fair Value 51 62
Other Assets, Fair Value Disclosure 10 9
Assets, Fair Value Disclosure 61 71
Interest Rate Derivative Liabilities, at Fair Value (43) (23)
Price Risk Derivative Liabilities, at Fair Value (46) (53)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (89) (76)
Commodity Derivatives - Natural Gas [Member] | Basis Swaps IFERC/NYMEX [Member]    
Price Risk Derivative Assets, at Fair Value 3 60
Price Risk Derivative Liabilities, at Fair Value (11) (25)
Commodity Derivatives - Natural Gas [Member] | Swing Swaps IFERC [Member]    
Price Risk Derivative Assets, at Fair Value 4 75
Price Risk Derivative Liabilities, at Fair Value (2) (12)
Commodity Derivatives - Natural Gas [Member] | Fixed Swaps/Futures [Member]    
Price Risk Derivative Assets, at Fair Value 31 113
Price Risk Derivative Liabilities, at Fair Value (2) (4)
Commodity Derivatives - Natural Gas [Member] | Forward Physical Contracts [Member]    
Price Risk Derivative Assets, at Fair Value 6 10
Price Risk Derivative Liabilities, at Fair Value (1) (2)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Basis Swaps IFERC/NYMEX [Member]    
Price Risk Derivative Assets, at Fair Value 3 60
Price Risk Derivative Liabilities, at Fair Value (11) (25)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Swing Swaps IFERC [Member]    
Price Risk Derivative Assets, at Fair Value 4 75
Price Risk Derivative Liabilities, at Fair Value (2) (12)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Fixed Swaps/Futures [Member]    
Price Risk Derivative Assets, at Fair Value 31 113
Price Risk Derivative Liabilities, at Fair Value (2) (4)
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 0
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 10
Price Risk Derivative Liabilities, at Fair Value (1) (2)
Commodity Derivatives - Refined Products [Member] | Future [Member]    
Price Risk Derivative Assets, at Fair Value 1 20
Price Risk Derivative Liabilities, at Fair Value (16) (59)
Commodity Derivatives - Refined Products [Member] | Level 1 | Future [Member]    
Price Risk Derivative Assets, at Fair Value 1 20
Price Risk Derivative Liabilities, at Fair Value (16) (59)
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 41 38
Price Risk Derivative Liabilities, at Fair Value (19) (12)
Commodity Derivatives - Crude [Member] | Level 1 | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 41 38
Price Risk Derivative Liabilities, at Fair Value (19) (12)
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] | Call Option [Member]    
Price Risk Derivative Assets, at Fair Value 2  
Price Risk Derivative Liabilities, at Fair Value (1)  
Commodity Derivatives - Power [Member] | Future [Member]    
Price Risk Derivative Assets, at Fair Value 9 3
Price Risk Derivative Liabilities, at Fair Value (7) (3)
Commodity Derivatives - Power [Member] | Forward Contracts    
Price Risk Derivative Assets, at Fair Value 45 52
Price Risk Derivative Liabilities, at Fair Value (45) (51)
Commodity Derivatives - Power [Member] | Level 1 | Call Option [Member]    
Price Risk Derivative Assets, at Fair Value 2  
Price Risk Derivative Liabilities, at Fair Value (1)  
Commodity Derivatives - Power [Member] | Level 1 | Future [Member]    
Price Risk Derivative Assets, at Fair Value 9 3
Price Risk Derivative Liabilities, at Fair Value (7) (3)
Commodity Derivatives - Power [Member] | Level 1 | Forward Contracts    
Price Risk Derivative Assets, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value 0 0
Commodity Derivatives - Power [Member] | Level 2 | Call Option [Member]    
Price Risk Derivative Assets, at Fair Value 0  
Price Risk Derivative Liabilities, at Fair Value 0  
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 45 52
Price Risk Derivative Liabilities, at Fair Value (45) (51)
Commodity Derivatives - NGLs [Member] | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 219 317
Price Risk Derivative Liabilities, at Fair Value (205) (358)
Commodity Derivatives - NGLs [Member] | Level 1 | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 219 317
Price Risk Derivative Liabilities, at Fair Value (205) (358)
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