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Estimates (Fair Value Of Financial Assets And Liabilities Measured On Recurring Basis) (Details) - Fair Value, Recurring [Member] - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Commodity derivatives: $ 263 $ 610
Other Assets, Fair Value Disclosure 212 217
Total assets 475 833
Interest rate derivatives   (4)
Commodity derivatives: (293) (460)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (293) (464)
Interest Rate Derivative Assets, at Fair Value   6
Level 1 [Member]    
Commodity derivatives: 263 602
Other Assets, Fair Value Disclosure 212 217
Total assets 475 819
Interest rate derivatives   0
Commodity derivatives: (293) (460)
Financial and Nonfinancial Liabilities, Fair Value Disclosure (293) (460)
Interest Rate Derivative Assets, at Fair Value   0
Level 2 [Member]    
Commodity derivatives: 0 8
Other Assets, Fair Value Disclosure 0 0
Total assets 0 14
Interest rate derivatives   (4)
Commodity derivatives: 0 0
Financial and Nonfinancial Liabilities, Fair Value Disclosure 0 (4)
Interest Rate Derivative Assets, at Fair Value   6
Commodity Derivatives - Power [Member] | Forwards Swaps [Member]    
Commodity derivatives: 39 57
Commodity derivatives: (38) (56)
Commodity Derivatives - Power [Member] | Future [Member]    
Commodity derivatives: 10 8
Commodity derivatives: (10) (8)
Commodity Derivatives - Power [Member] | Level 1 [Member] | Forwards Swaps [Member]    
Commodity derivatives: 39 57
Commodity derivatives: (38) (56)
Commodity Derivatives - Power [Member] | Level 1 [Member] | Future [Member]    
Commodity derivatives: 10 8
Commodity derivatives: (10) (8)
Commodity Derivatives - Power [Member] | Level 2 [Member] | Forwards Swaps [Member]    
Commodity derivatives: 0 0
Commodity derivatives: 0 0
Commodity Derivatives - Power [Member] | Level 2 [Member] | Future [Member]    
Commodity derivatives: 0 0
Commodity derivatives: 0 0
Commodity Derivatives - Refined Products [Member] | Future [Member]    
Commodity derivatives: 3 35
Commodity derivatives: (9) (18)
Commodity Derivatives - Refined Products [Member] | Level 1 [Member] | Future [Member]    
Commodity derivatives: 3 35
Commodity derivatives: (9) (18)
Commodity Derivatives - Refined Products [Member] | Level 2 [Member] | Future [Member]    
Commodity derivatives: 0 0
Commodity derivatives: 0 0
Commodity Derivatives - Crude [Member] | Forwards Swaps [Member]    
Commodity derivatives: 25 45
Commodity derivatives: (35) (37)
Commodity Derivatives - Crude [Member] | Level 1 [Member] | Forwards Swaps [Member]    
Commodity derivatives: 25 45
Commodity derivatives: (35) (37)
Commodity Derivatives - Crude [Member] | Level 2 [Member] | Forwards Swaps [Member]    
Commodity derivatives: 0 0
Commodity derivatives: 0 0
Commodity Derivatives - Natural Gas [Member] | Basis Swaps IFERC NYMEX [Member]    
Commodity derivatives: 6 24
Commodity derivatives: (11) (3)
Commodity Derivatives - Natural Gas [Member] | Swing Swaps IFERC [Member]    
Commodity derivatives: 4 20
Commodity derivatives: (11) (2)
Commodity Derivatives - Natural Gas [Member] | Fixed Swaps/Futures [Member]    
Commodity derivatives: 10 77
Commodity derivatives: (9) (16)
Commodity Derivatives - Natural Gas [Member] | Forward Physical Swaps [Member]    
Commodity derivatives:   8
Commodity Derivatives - Natural Gas [Member] | Put Option [Member]    
Commodity derivatives:   2
Commodity Derivatives - Natural Gas [Member] | Level 1 [Member] | Basis Swaps IFERC NYMEX [Member]    
Commodity derivatives: 6 24
Commodity derivatives: (11) (3)
Commodity Derivatives - Natural Gas [Member] | Level 1 [Member] | Swing Swaps IFERC [Member]    
Commodity derivatives: 4 20
Commodity derivatives: (11) (2)
Commodity Derivatives - Natural Gas [Member] | Level 1 [Member] | Fixed Swaps/Futures [Member]    
Commodity derivatives: 10 77
Commodity derivatives: (9) (16)
Commodity Derivatives - Natural Gas [Member] | Level 1 [Member] | Forward Physical Swaps [Member]    
Commodity derivatives:   0
Commodity Derivatives - Natural Gas [Member] | Level 1 [Member] | Put Option [Member]    
Commodity derivatives:   2
Commodity Derivatives - Natural Gas [Member] | Level 2 [Member] | Basis Swaps IFERC NYMEX [Member]    
Commodity derivatives: 0 0
Commodity derivatives: 0
Commodity Derivatives - Natural Gas [Member] | Level 2 [Member] | Swing Swaps IFERC [Member]    
Commodity derivatives: 0 0
Commodity derivatives: 0 0
Commodity Derivatives - Natural Gas [Member] | Level 2 [Member] | Fixed Swaps/Futures [Member]    
Commodity derivatives: 0 0
Commodity derivatives: 0 0
Commodity Derivatives - Natural Gas [Member] | Level 2 [Member] | Forward Physical Swaps [Member]    
Commodity derivatives:   8
Commodity Derivatives - Natural Gas [Member] | Level 2 [Member] | Put Option [Member]    
Commodity derivatives:   0
Commodity Derivatives - NGLs [Member] | Forwards Swaps [Member]    
Commodity derivatives: 166 336
Commodity derivatives: (170) (316)
Commodity Derivatives - NGLs [Member] | Put Option [Member]    
Commodity derivatives:   1
Commodity Derivatives - NGLs [Member] | Options - Calls [Member]    
Commodity derivatives:   1
Commodity Derivatives - NGLs [Member] | Level 1 [Member] | Forwards Swaps [Member]    
Commodity derivatives: 166 336
Commodity derivatives: (170) (316)
Commodity Derivatives - NGLs [Member] | Level 1 [Member] | Put Option [Member]    
Commodity derivatives:   1
Commodity Derivatives - NGLs [Member] | Level 1 [Member] | Options - Calls [Member]    
Commodity derivatives:   1
Commodity Derivatives - NGLs [Member] | Level 2 [Member] | Forwards Swaps [Member]    
Commodity derivatives: 0 0
Commodity derivatives: $ 0 0
Commodity Derivatives - NGLs [Member] | Level 2 [Member] | Put Option [Member]    
Commodity derivatives:   0
Commodity Derivatives - NGLs [Member] | Level 2 [Member] | Options - Calls [Member]    
Commodity derivatives:   $ 0