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Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 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)June 30, 2020December 31, 2019
Property, plant and equipment accumulated depreciation $1,868  $1,752  
Intangible assets accumulated amortization 1,279  1,262  
Activity in Allowance for Credit Losses
The following table represents the activity in the allowance for credit losses for the three and six months ended June 30, 2020:
(In millions)Three months ended June 30, 2020Six months ended June 30, 2020
Beginning balance$39  $43  
Provision for credit losses24  48  
Write-offs(20) (52) 
Recoveries collected4  8  
Ending balance$47  $47  
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)June 30, 2020December 31, 2019
Cash and cash equivalents
$418  $345  
Funds deposited by counterparties
36  32  
Restricted cash
8  8  
Cash and cash equivalents, funds deposited by counterparties and restricted cash shown in the statement of cash flows
$462  $385