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Discontinued Operations (Financial Results That Have Been Reclassified from Continuing Operations and Included in Discontinued Operations) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Other (Income) and Deductions |  |  |
Net Income from Discontinued Operations, Net of Taxes | $ 0 | $ 117 | $ 326
Less: Net Income Attributable to Noncontrolling Interests | 0 | 6 | 12
Net Income from Discontinued Operations | $ 0 | 111 | 314
Transaction costs |  | 59 | 8
DT Midstream | Discontinued operations, spinoff |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Operating Revenues — Non-utility operations |  | 405 | 754
Operating Expenses |  |  |
Cost of gas and other — non-utility |  | 15 | 21
Operation and maintenance |  | 123 | 138
Depreciation and amortization |  | 82 | 151
Taxes other than income |  | 13 | 15
Asset (gains) losses and impairments, net |  | 17 | (2)
Operating Expenses |  | 250 | 323
Operating Income |  | 155 | 431
Other (Income) and Deductions |  |  |
Interest expense |  | 50 | 113
Interest income |  | (4) | (9)
Other income |  | (62) | (129)
Other (Income) and Deductions |  | (16) | (25)
Income from Discontinued Operations Before Income Taxes |  | 171 | 456
Income Tax Expense |  | 54 | 130
Net Income from Discontinued Operations, Net of Taxes |  | 117 | 326
Less: Net Income Attributable to Noncontrolling Interests |  | 6 | 12
Net Income from Discontinued Operations |  | $ 111 | $ 314

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