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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, 2022
Dec. 31, 2021
Price Risk Derivative Assets, at Fair Value $ 883 $ 272
Other Assets, Fair Value Disclosure 31 39
Assets, Fair Value Disclosure 914 311
Interest Rate Derivative Liabilities, at Fair Value (84) (387)
Price Risk Derivative Liabilities, at Fair Value (660) (211)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (744) (598)
Level 1    
Price Risk Derivative Assets, at Fair Value 812 248
Other Assets, Fair Value Disclosure 20 26
Assets, Fair Value Disclosure 832 274
Interest Rate Derivative Liabilities, at Fair Value 0 0
Price Risk Derivative Liabilities, at Fair Value (601) (190)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (601) (190)
Level 2    
Price Risk Derivative Assets, at Fair Value 71 24
Other Assets, Fair Value Disclosure 11 13
Assets, Fair Value Disclosure 82 37
Interest Rate Derivative Liabilities, at Fair Value (84) (387)
Price Risk Derivative Liabilities, at Fair Value (59) (21)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (143) (408)
Commodity Derivatives - Natural Gas [Member] | Basis Swaps IFERC/NYMEX [Member]    
Price Risk Derivative Assets, at Fair Value 23 7
Price Risk Derivative Liabilities, at Fair Value (11) (10)
Commodity Derivatives - Natural Gas [Member] | Swing Swaps IFERC [Member]    
Price Risk Derivative Assets, at Fair Value 27 38
Price Risk Derivative Liabilities, at Fair Value (2) (6)
Commodity Derivatives - Natural Gas [Member] | Fixed Swaps/Futures [Member]    
Price Risk Derivative Assets, at Fair Value 50 26
Price Risk Derivative Liabilities, at Fair Value (63) (9)
Commodity Derivatives - Natural Gas [Member] | Forward Physical Contracts [Member]    
Price Risk Derivative Assets, at Fair Value 8 7
Price Risk Derivative Liabilities, at Fair Value (2) (6)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Basis Swaps IFERC/NYMEX [Member]    
Price Risk Derivative Assets, at Fair Value 23 7
Price Risk Derivative Liabilities, at Fair Value (11) (10)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Swing Swaps IFERC [Member]    
Price Risk Derivative Assets, at Fair Value 27 38
Price Risk Derivative Liabilities, at Fair Value (2) (6)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Fixed Swaps/Futures [Member]    
Price Risk Derivative Assets, at Fair Value 50 26
Price Risk Derivative Liabilities, at Fair Value (63) (9)
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 8 7
Price Risk Derivative Liabilities, at Fair Value (2) (6)
Commodity Derivatives - Refined Products [Member] | Future [Member]    
Price Risk Derivative Assets, at Fair Value 11 3
Price Risk Derivative Liabilities, at Fair Value (8) (18)
Commodity Derivatives - Refined Products [Member] | Level 1 | Future [Member]    
Price Risk Derivative Assets, at Fair Value 11 3
Price Risk Derivative Liabilities, at Fair Value (8) (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 26 16
Price Risk Derivative Liabilities, at Fair Value (14) (3)
Commodity Derivatives - Crude [Member] | Level 1 | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 26 16
Price Risk Derivative Liabilities, at Fair Value (14) (3)
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 Liabilities, at Fair Value (1)  
Commodity Derivatives - Power [Member] | Future [Member]    
Price Risk Derivative Assets, at Fair Value 6 6
Price Risk Derivative Liabilities, at Fair Value (9) (4)
Commodity Derivatives - Power [Member] | Forward Contracts    
Price Risk Derivative Assets, at Fair Value 63 17
Price Risk Derivative Liabilities, at Fair Value (57) (15)
Commodity Derivatives - Power [Member] | Level 1 | Call Option [Member]    
Price Risk Derivative Liabilities, at Fair Value (1)  
Commodity Derivatives - Power [Member] | Level 1 | Future [Member]    
Price Risk Derivative Assets, at Fair Value 6 6
Price Risk Derivative Liabilities, at Fair Value (9) (4)
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 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 63 17
Price Risk Derivative Liabilities, at Fair Value (57) (15)
Commodity Derivatives - NGLs [Member] | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 669 152
Price Risk Derivative Liabilities, at Fair Value (493) (140)
Commodity Derivatives - NGLs [Member] | Level 1 | Forward Swaps [Member]    
Price Risk Derivative Assets, at Fair Value 669 152
Price Risk Derivative Liabilities, at Fair Value (493) (140)
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