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Other Receivables (Information) (Details) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Notes to Consolidated Financial Statements [Abstract]    
Government institutions $ 78 $ 39
Prepaid expenses 33 25
Insurance receivables 26 6
Current tax assets 16 66
Advances to suppliers 10 15
Other 62 71
Total other receivables $ 225 $ 222