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Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2022
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, 2022December 31, 2021
Property, plant and equipment accumulated depreciation $1,419 $1,308 
Intangible assets accumulated amortization 1,867 1,636 
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, 2022 and 2021:
Three months ended March 31,
(In millions)20222021
Beginning balance$683 $67 
Acquired balance from Direct Energy— 112 
Provision for credit losses25 611 
Write-offs(50)(48)
Recoveries collected8 7 
Ending balance$666 $749 
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, 2022December 31, 2021
Cash and cash equivalents
$387 $250 
Funds deposited by counterparties
2,570 845 
Restricted cash
39 15 
Cash and cash equivalents, funds deposited by counterparties and restricted cash shown in the statement of cash flows
$2,996 $1,110