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Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Cash flows from operating activities      
Net income (loss) $ 347 $ (172) $ 506
Adjustments for      
Depreciation and amortization 390 401 355
Impairment 28 5 75
Revaluation of balances from financial institutions and interest expenses, net 137 76 44
Share in earnings of equity-accounted investees, net 0 (18) (11)
Other capital losses (gains), net (54) 433 (210)
Share-based compensation 16 15 15
Deferred tax expenses (income) (46) (2) 5
Adjustments for reconcile profit loss 471 910 273
Change in inventories 57 70 25
Change in trade and other receivables 21 150 (86)
Change in trade and other payables (45) (90) (55)
Change in provisions and employee benefits (4) 98 (90)
Net change in operating assets and liabilities 29 228 (206)
Net cash provided by operating activities 847 966 573
Cash flows from investing activities      
Investments in shares and proceeds from deposits, net (65) (198) 34
Business combinations, net of cash acquired 0 0 (351)
Purchases of property, plant and equipment and intangible assets (457) (632) (619)
Proceeds from divestiture of subsidiaries 6 17 364
Proceeds from sale of equity accounted investee 168 0 0
Dividends from equity-accounted investees 3 12 19
Proceeds from sale of property, plant and equipment 12 0 0
Other 0 1 6
Net cash used in investing activities (333) (800) (547)
Cash flows from financing activities      
Dividend paid to the company's shareholders (237) (162) (347)
Receipt (Repayment) of long-term debt, net (421) (87) 355
Short-term credit from banks and others, net 147 14 8
Other 0 (4) (1)
Net cash provided by (used in) financing activities (511) (239) 15
Cash and cash equivalents as at the beginning of the year 87 161 138
Net change in cash and cash equivalents 3 (73) 41
Net effect of currency translation on cash and cash equivalents (2) (1) (18)
Cash and cash equivalents included as part of assets held for sale (5) 0 0
Cash and cash equivalents as at the end of the year 83 87 161
Statements of Cash Flows - Additional Information      
Income taxes paid, net of tax refunds 127 84 20
Interest paid $ 111 $ 112 $ 87