v3.10.0.1
ACCOUNTING PRONOUNCEMENTS - RECONCILIATION OF CASH, CASH EQUIVALENTS, AND RESTRICTED CASH (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2017
Dec. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]        
Cash and cash equivalents $ 221 $ 601 $ 575  
Restricted cash included in other current assets 4   6  
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows $ 225 $ 605 $ 581 $ 938