v3.10.0.1
ACCOUNTING PRONOUNCEMENTS - RECONCILIATION OF CASH, CASH EQUIVALENTS, AND RESTRICTED CASH (Details) - USD ($)
$ in Millions
Sep. 30, 2018
Dec. 31, 2017
Sep. 30, 2017
Dec. 31, 2016
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]        
Cash and cash equivalents $ 267 $ 601 $ 389  
Restricted cash included in other current assets 4   3  
Total cash, cash equivalents, and restricted cash shown in the statement of cash flows $ 271 $ 605 $ 392 $ 938