Significant Accounting Policies Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2018
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]  
Reconciliation of the cash and cash equivalents and restricted funds
The following table provides a reconciliation of the cash, cash equivalents and restricted funds as presented on the Consolidated Balance Sheets, to the sum of such amounts presented on the Consolidated Statements of Cash Flows for the periods ended June 30:
 
2018
 
2017
Cash and cash equivalents
$
68

 
$
64

Restricted funds
27

 
28

Restricted funds included in other long-term assets
2

 
1

Cash and cash equivalents and restricted funds as presented on the Consolidated Statements of Cash Flows
$
97

 
$
93