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CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Operating activities    
Profit / (loss) before tax from continuing operations $ 338 $ 111
Non-cash adjustments to reconcile profit before tax to net cash flows:    
Depreciation, amortization and impairment loss / (reversal) 940 1,049
Gain / (loss) on disposal of non-current assets 37 9
Gain / (loss) on sale of subsidiaries (20)  
Finance income (31) (46)
Finance costs 423 447
Other non-operating losses 25 152
Share of loss and impairment of joint ventures and associates   132
Net foreign exchange gain (1) (62)
Changes in trade and other receivables and prepayments 181 (66)
Changes in inventories (120) 11
Changes in trade and other payables 100 119
Changes in provisions and pensions 7 (69)
Interest paid (397) (418)
Interest received 32 36
Income tax paid (212) (243)
Net cash flows from operating activities 1,302 1,162
Investing activities    
Proceeds from sale of property and equipment and intangible assets 7 15
Purchase of property and equipment and intangible assets (1,177) (1,196)
Receipts / (payment on) from deposits 1,042 (24)
Receipts from / (investment in) of financial assets 36 (109)
Proceeds from sale of subsidiaries, net of cash disposed 2  
Net cash flows from / (used in) investing activities (90) (1,314)
Financing activities    
Acquisition of non-controlling interest   (259)
Proceeds from borrowings, net of fees paid 607 4,442
Repayment of borrowings (1,643) (3,606)
Dividends paid to owners of the parent (286) (332)
Dividends paid to non-controlling interests (11) (82)
Net cash flows from / (used in) financing activities (1,333) 163
Net (decrease) / increase in cash and cash equivalents (121) 11
Net foreign exchange difference (47) (74)
Cash and cash equivalents classified as held for sale at the beginning of period 10  
Cash and cash equivalents classified as held for sale at the end of the period (4) (6)
Cash and cash equivalents at beginning of period 1,304 2,942
Cash and cash equivalents at end of period net of overdrafts $ 1,142 $ 2,873