27.1 Cash flows from operating activities

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(Profit) / loss on investing activities

	Year ended December 31, 2020	Year ended December 31, 2019
Accrual valuation of derivative instruments	235	(254)
(Gain)/loss on disposal of property, plant and equipment	(32)	(18)
(Gain)/loss on disposal of non-current financial assets	11	1
Other	30	7
TOTAL (GAIN)/LOSS ON INVESTING ACTIVITIES	244	(264)

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Change in receivables

	Year ended December 31, 2020	Year ended December 31, 2019
Change in trade receivables and other financial receivables	(8)	(725)
Deposit balance adjustment	10	13
Other	(3)	(8)
TOTAL CHANGE IN RECEIVABLES	(1)	(720)

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Change in inventories

	Year ended December 31, 2020	Year ended December 31, 2019
Change in inventories	1,386	(1,810)
Adjustment for transfer of investment materials to PPE	(18)	–
Other	2	(1)
TOTAL CHANGE IN INVENTORIES	1,370	(1,811)

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Change in liabilities, excluding credits and loans

	Year ended December 31, 2020	Year ended December 31, 2019
Change in trade payables and other financial payables	(160)	(23)
Change in other non-financial liabilities	345	161
Adjustment for change in investment liabilities	580	8
Other	(1)	24
TOTAL CHANGE IN LIABILITIES	764	170

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Change in other non-financial assets and prepayments

	Year ended December 31, 2020	Year ended December 31, 2019
Change in other assets	(357)	(295)
Change in accruals and deferrals	(19)	(2)
Adjustment for change in prepayments for fixed assets under construction	161	137
Adjustment for change concerning financing/investing activities	(35)	(26)
Other	(3)	(11)
TOTAL CHANGE IN OTHER NON-FINANCIAL ASSETS AND PREPAYMENTS	(253)	(197)

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Change in provisions

	Year ended December 31, 2020	Year ended December 31, 2019
Change in provisions	4,500	4,982
Adjustment for change in actuarial provisions recognised in other comprehensive income	(235)	(266)
Adjustment for change in rehabilitation provisions recognised in assets	(912)	(1,879)
Other	(6)	(1)
TOTAL CHANGES IN PROVISIONS	3,347	2,836

27. Statement of cash flows

27.2 Cash flows from investing activities