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Acquisitions and Dispositions - Direct Energy Purchase Price Allocation (Details) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jan. 05, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Other Assets |  |  |  |
Goodwill |  | $ 1,650 | $ 1,795 | $ 579
Texas |  |  |  |
Other Assets |  |  |  |
Goodwill |  | 710 | 716 | 289
East |  |  |  |
Other Assets |  |  |  |
Goodwill |  | $ 723 | $ 853 | $ 240
Customer Relationships |  |  |  |
Other Liabilities |  |  |  |
Weighted average useful life, years |  | 6 years | 12 years |
Direct Energy |  |  |  |
Current Assets |  |  |  |
Cash and cash equivalents |  |  | $ 152 |
Funds deposited by counterparties |  |  | 21 |
Restricted cash |  |  | 9 |
Accounts receivable, net |  |  | 1,802 |
Inventory |  |  | 106 |
Derivative instruments |  |  | 1,014 |
Cash collateral paid in support of energy risk management activities |  |  | 233 |
Prepayments and other current assets |  |  | 173 |
Total current assets |  |  | 3,510 |
Property, plant and equipment, net |  |  | 151 |
Other Assets |  |  |  |
Goodwill |  |  | 1,250 |
Intangible assets |  |  | 2,321 |
Derivative instruments |  |  | 531 |
Other non-current assets |  |  | 31 |
Total other assets |  |  | 4,133 |
Total Assets |  |  | 7,794 |
Current Liabilities |  |  |  |
Accounts payable |  |  | 1,116 |
Derivative instruments |  |  | 1,266 |
Cash collateral received in support of energy risk management activities |  |  | 21 |
Accrued expenses and other current liabilities |  |  | 670 |
Total current liabilities |  |  | 3,073 |
Other Liabilities |  |  |  |
Derivative instruments |  |  | 562 |
Deferred income taxes |  |  | 320 |
Other non-current liabilities |  |  | 115 |
Total other liabilities |  |  | 997 |
Total Liabilities |  |  | 4,070 |
Direct Energy Purchase Price |  |  | 3,724 |
Goodwill, expected to be tax deductible |  |  | 322 |
Direct Energy | Texas |  |  |  |
Other Assets |  |  |  |
Goodwill |  |  | 427 |
Direct Energy | East |  |  |  |
Other Assets |  |  |  |
Goodwill |  |  | 648 |
Direct Energy | West/Services/Other |  |  |  |
Other Assets |  |  |  |
Goodwill |  |  | 175 |
Direct Energy | Customer Relationships |  |  |  |
Other Assets |  |  |  |
Intangible assets |  |  | 1,277 |
Other Liabilities |  |  |  |
Weighted average useful life, years | 12 years |  |  |
Direct Energy | Customer and Supply Contracts |  |  |  |
Other Assets |  |  |  |
Intangible assets |  |  | 610 |
Other Liabilities |  |  |  |
Weighted average useful life, years | 12 years |  |  |
Direct Energy | Trade Names |  |  |  |
Other Assets |  |  |  |
Intangible assets |  |  | 310 |
Other Liabilities |  |  |  |
Weighted average useful life, years | 12 years |  |  |
Direct Energy | Renewables Energy Certificates |  |  |  |
Other Assets |  |  |  |
Intangible assets |  |  | $ 124 |
Other Liabilities |  |  |  |
Weighted average useful life, years | 12 years |  |  |

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