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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, 2025 | Dec. 31, 2024
--- | --- | ---
Price Risk Derivative Assets, at Fair Value | $ 384 | $ 263
Other Assets, Fair Value Disclosure | 215 | 212
Assets, Fair Value Disclosure | 599 | 475
Price Risk Derivative Liabilities, at Fair Value | (305) | (293)
Financial and Nonfinancial Liabilities, Fair Value Disclosure | (305) | (293)
Level 1 |  |
Price Risk Derivative Assets, at Fair Value | 317 | 263
Other Assets, Fair Value Disclosure | 215 | 212
Assets, Fair Value Disclosure | 532 | 475
Price Risk Derivative Liabilities, at Fair Value | (254) | (293)
Financial and Nonfinancial Liabilities, Fair Value Disclosure | (254) | (293)
Level 2 |  |
Price Risk Derivative Assets, at Fair Value | 67 | 0
Other Assets, Fair Value Disclosure | 0 | 0
Assets, Fair Value Disclosure | 67 | 0
Price Risk Derivative Liabilities, at Fair Value | (51) | 0
Financial and Nonfinancial Liabilities, Fair Value Disclosure | (51) | 0
Fair Value, Inputs, Level 3 |  |
Price Risk Derivative Assets, at Fair Value | 0 | 0
Other Assets, Fair Value Disclosure | 0 | 0
Assets, Fair Value Disclosure | 0 | 0
Price Risk Derivative Liabilities, at Fair Value | 0 | 0
Financial and Nonfinancial Liabilities, Fair Value Disclosure | 0 | 0
Commodity Derivatives - Natural Gas [Member] | Basis Swaps IFERC/NYMEX [Member] |  |
Price Risk Derivative Assets, at Fair Value | 12 | 6
Price Risk Derivative Liabilities, at Fair Value | (20) | (11)
Commodity Derivatives - Natural Gas [Member] | Swing Swaps IFERC [Member] |  |
Price Risk Derivative Assets, at Fair Value | 4 | 4
Price Risk Derivative Liabilities, at Fair Value | (3) | (11)
Commodity Derivatives - Natural Gas [Member] | Fixed Swaps/Futures [Member] |  |
Price Risk Derivative Assets, at Fair Value | 46 | 10
Price Risk Derivative Liabilities, at Fair Value | (4) | (9)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Basis Swaps IFERC/NYMEX [Member] |  |
Price Risk Derivative Assets, at Fair Value | 12 | 6
Price Risk Derivative Liabilities, at Fair Value | (20) | (11)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Swing Swaps IFERC [Member] |  |
Price Risk Derivative Assets, at Fair Value | 4 | 4
Price Risk Derivative Liabilities, at Fair Value | (3) | (11)
Commodity Derivatives - Natural Gas [Member] | Level 1 | Fixed Swaps/Futures [Member] |  |
Price Risk Derivative Assets, at Fair Value | 46 | 10
Price Risk Derivative Liabilities, at Fair Value | (4) | (9)
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] | Fair Value, Inputs, Level 3 | 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] | Fair Value, Inputs, Level 3 | 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] | Fair Value, Inputs, Level 3 | Fixed Swaps/Futures [Member] |  |
Price Risk Derivative Assets, at Fair Value | 0 | 0
Price Risk Derivative Liabilities, at Fair Value | 0 | 0
Commodity Derivatives - Refined Products [Member] | Future [Member] |  |
Price Risk Derivative Assets, at Fair Value | 8 | 3
Price Risk Derivative Liabilities, at Fair Value | (18) | (9)
Commodity Derivatives - Refined Products [Member] | Level 1 | Future [Member] |  |
Price Risk Derivative Assets, at Fair Value | 8 | 3
Price Risk Derivative Liabilities, at Fair Value | (18) | (9)
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 - Refined Products [Member] | Fair Value, Inputs, Level 3 | 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 | 27 | 25
Price Risk Derivative Liabilities, at Fair Value | (30) | (35)
Commodity Derivatives - Crude [Member] | Level 1 | Forward Swaps [Member] |  |
Price Risk Derivative Assets, at Fair Value | 22 | 25
Price Risk Derivative Liabilities, at Fair Value | (25) | (35)
Commodity Derivatives - Crude [Member] | Level 2 | Forward Swaps [Member] |  |
Price Risk Derivative Assets, at Fair Value | 5 | 0
Price Risk Derivative Liabilities, at Fair Value | (5) | 0
Commodity Derivatives - Crude [Member] | Fair Value, Inputs, Level 3 | 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 | 29 | 10
Price Risk Derivative Liabilities, at Fair Value | (29) | (10)
Commodity Derivatives - Power [Member] | Forward Contracts |  |
Price Risk Derivative Assets, at Fair Value | 42 | 39
Price Risk Derivative Liabilities, at Fair Value | (41) | (38)
Commodity Derivatives - Power [Member] | Call Option [Member] |  |
Price Risk Derivative Assets, at Fair Value | 1 |
Price Risk Derivative Liabilities, at Fair Value | (1) |
Commodity Derivatives - Power [Member] | Level 1 | Future [Member] |  |
Price Risk Derivative Assets, at Fair Value | 29 | 10
Price Risk Derivative Liabilities, at Fair Value | (29) | (10)
Commodity Derivatives - Power [Member] | Level 1 | Forward Contracts |  |
Price Risk Derivative Assets, at Fair Value | 0 | 39
Price Risk Derivative Liabilities, at Fair Value | 0 | (38)
Commodity Derivatives - Power [Member] | Level 1 | Call Option [Member] |  |
Price Risk Derivative Assets, at Fair Value | 1 |
Price Risk Derivative Liabilities, at Fair Value | (1) |
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 | 42 | 0
Price Risk Derivative Liabilities, at Fair Value | (41) | 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] | Fair Value, Inputs, Level 3 | Future [Member] |  |
Price Risk Derivative Assets, at Fair Value | 0 | 0
Price Risk Derivative Liabilities, at Fair Value | 0 | 0
Commodity Derivatives - Power [Member] | Fair Value, Inputs, Level 3 | Forward Contracts |  |
Price Risk Derivative Assets, at Fair Value | 0 | 0
Price Risk Derivative Liabilities, at Fair Value | 0 | 0
Commodity Derivatives - Power [Member] | Fair Value, Inputs, Level 3 | Call Option [Member] |  |
Price Risk Derivative Assets, at Fair Value | 0 |
Price Risk Derivative Liabilities, at Fair Value | 0 |
Commodity Derivatives - NGLs [Member] | Forward Swaps [Member] |  |
Price Risk Derivative Assets, at Fair Value | 215 | 166
Price Risk Derivative Liabilities, at Fair Value | (159) | (170)
Commodity Derivatives - NGLs [Member] | Level 1 | Forward Swaps [Member] |  |
Price Risk Derivative Assets, at Fair Value | 195 | 166
Price Risk Derivative Liabilities, at Fair Value | (154) | (170)
Commodity Derivatives - NGLs [Member] | Level 2 | Forward Swaps [Member] |  |
Price Risk Derivative Assets, at Fair Value | 20 | 0
Price Risk Derivative Liabilities, at Fair Value | (5) | 0
Commodity Derivatives - NGLs [Member] | Fair Value, Inputs, Level 3 | Forward Swaps [Member] |  |
Price Risk Derivative Assets, at Fair Value | 0 | 0
Price Risk Derivative Liabilities, at Fair Value | $ 0 | $ 0

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