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Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 30, 2019
Accounting Policies [Abstract]  
Reconciliation of Cash and Cash Equivalents and Restricted Cash The following table presents a reconciliation of cash and cash equivalents and restricted cash reported on our Condensed Consolidated Balance Sheet that sum to the total of the amounts shown on our Condensed Consolidated Statement of Cash Flows as of the end of the period (in millions):

 
September 30,
2019
Cash and cash equivalents
$
609

Restricted cash
59

Total cash and cash equivalents and restricted cash
$
668