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Financial and Other Derivative Instruments (Fair Value of Derivative Instruments) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | $ 1,922 | $ 1,391
Derivative Liabilities | (2,169) | (1,508)
Current derivative asset |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1,517 | 1,035
Noncurrent derivative asset |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 405 | 356
Current derivative liability |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | (1,535) | (1,037)
Noncurrent derivative liability |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | (634) | (471)
Interest rate contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1 | 0
Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1 | 0
Derivative Liabilities | (2) | (4)
Natural gas |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 744 | 454
Derivative Liabilities | (1,018) | (594)
Electricity |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 963 | 643
Derivative Liabilities | (935) | (622)
Environmental & Other |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 213 | 294
Derivative Liabilities | (214) | (288)
Derivatives designated as hedging instruments |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1 | 0
Derivative Liabilities | (2) | (4)
Derivatives designated as hedging instruments | Interest rate contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1 | 0
Derivative Liabilities | 0 | 0
Derivatives designated as hedging instruments | Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 0 | 0
Derivative Liabilities | (2) | (4)
Derivatives not designated as hedging instruments |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1,921 | 1,391
Derivative Liabilities | (2,167) | (1,504)
Derivatives not designated as hedging instruments | Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1 | 0
Derivative Liabilities | 0 | 0
Derivatives not designated as hedging instruments | Natural gas |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 744 | 454
Derivative Liabilities | (1,018) | (594)
Derivatives not designated as hedging instruments | Electricity |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 963 | 643
Derivative Liabilities | (935) | (622)
Derivatives not designated as hedging instruments | Environmental & Other |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 213 | 294
Derivative Liabilities | $ (214) | $ (288)

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