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Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2021
Accounting Policies [Abstract] |
Other Balance Sheet Information | The following table presents the accumulated depreciation included in property, plant and equipment, net and accumulated amortization included in intangible assets, net:
(In millions) | March 31, 2021 |  | December 31, 2020 |
Property, plant and equipment accumulated depreciation | $ | 1,566 |  |  | $ | 1,936 |  |
Intangible assets accumulated amortization | 1,424 |  |  | 1,357 |  |
Activity in Allowance for Credit Losses | The following table represents the activity in the allowance for credit losses for the three months ended March 31, 2021:
(In millions) | Three months ended March 31, 2021 |  |  |  | Three months ended March 31, 2020 |  |
Beginning balance | $ | 67 |  |  |  |  | $ | 43 |  |  |
Acquired balance from Direct Energy | 112 |  |  |  |  | — |  |  |
Provision for credit losses | 611 |  |  |  |  | 24 |  |  |
Write-offs | (48) |  |  |  |  | (32) |  |  |
Recoveries collected | 7 |  |  |  |  | 4 |  |  |
Ending balance | $ | 749 |  |  |  |  | $ | 39 |  |  |
Reconciliation of Cash and Cash Equivalents, Restricted Cash and Funds Deposited by Counterparties | The following table provides a reconciliation of cash and cash equivalents, restricted cash and funds deposited by counterparties reported within the consolidated balance sheets that sum to the total of the same such amounts shown in the statements of cash flows:
(In millions) | March 31, 2021 |  | December 31, 2020 |  |  |  |
Cash and cash equivalents | $ | 501 |  |  | $ | 3,905 |  |  |  |  |
Funds deposited by counterparties | 55 |  |  | 19 |  |  |  |  |
Restricted cash | 18 |  |  | 6 |  |  |  |  |
Cash and cash equivalents, funds deposited by counterparties and restricted cash shown in the statement of cash flows | $ | 574 |  |  | $ | 3,930 |  |  |  |  |

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