Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Cash Flows - Balances per Consolidated Balance Sheets

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Consolidated Statements of Cash Flows - Balances per Consolidated Balance Sheets - USD ($)
$ in Millions
Jun. 30, 2017
Dec. 31, 2016
Jun. 30, 2016
Dec. 31, 2015
Balances per Consolidated Balance Sheets:        
Cash and cash equivalents $ 796 $ 876    
Restricted cash 1,032 860    
Non-current restricted cash 716 91    
Total cash, cash equivalents and restricted cash $ 2,544 $ 1,827 $ 1,806 $ 1,736