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Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2020
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, 2020December 31, 2019
Property, plant and equipment accumulated depreciation $1,832  $1,752  
Intangible assets accumulated amortization 1,237  1,262  
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, 2020:
(In millions)
Balance at January 1, 2020$43  
Provision for credit losses24  
Write-offs(32) 
Recoveries collected4  
Balance at March 31, 2020$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, 2020December 31, 2019
Cash and cash equivalents$759  $345  
Funds deposited by counterparties51  32  
Restricted cash8  8  
Cash and cash equivalents, funds deposited by counterparties and restricted cash shown in the statement of cash flows$818  $385