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Group statement of changes in equity - USD ($)
$ in Millions
Total
Share capital [member]
Share premium [Member]
Other reserves [Member]
Retained earnings [Member]
Total [member]
Non-controlling interests [Member]
Opening balance at Dec. 31, 2016 $ 45,730 $ 4,139 $ 4,304 $ 9,216 $ 21,631 $ 39,290 $ 6,440
Total comprehensive (loss)/income for the period 5,360     2,014 3,243 5,257 103
Current translation arising on Rio Tinto Limited's Share Capital 243 243       243  
Dividends (2,380)       (2,248) (2,248) (132)
Share buyback [1] (300) (1)   1 (300) (300)  
Own shares purchased from Rio Tinto shareholders to satisfy share options [2] (26)     (17) (9) (26)  
Change in equity held by Rio Tinto         20 20 (20)
Treasury shares reissued and other movements 1   1     1  
Equity issued to holders of non-controlling interests 143           143
Employee share options and other IFRS 2 charges to the income statement 54     26 28 54  
Closing balance at Jun. 30, 2017 48,825 4,381 4,305 11,240 22,365 42,291 6,534
Opening balance (Previously Stated [Member]) at Dec. 31, 2017 51,115 4,360 4,306 12,284 23,761 44,711 6,404
Opening balance (Restated [Member]) at Dec. 31, 2017 50,946 4,360 4,306 12,294 23,582 44,542 6,404
Opening balance at Dec. 31, 2017 51,115            
Adjustment for transition to new accounting standards | Increase (decrease) due to changes in accounting policy required by IFRSs [Member] [3] (169)     10 (179) (169)  
Total comprehensive (loss)/income for the period [4] 2,663     (2,188) 4,828 2,640 23
Current translation arising on Rio Tinto Limited's Share Capital (231) (231)       (231)  
Dividends (3,331)       (3,177) (3,177) (154)
Share buyback [5] (1,444) (4)   4 (1,444) (1,444)  
Own shares purchased from Rio Tinto shareholders to satisfy share options [2] (82)     (26) (56) (82)  
Change in equity held by Rio Tinto         28 28 (28)
Treasury shares reissued and other movements 5   5     5  
Equity issued to holders of non-controlling interests 38           38
Employee share options and other IFRS 2 charges to the income statement 52     24 28 52  
Transfers and other movements       34 (34)    
Closing balance at Jun. 30, 2018 $ 48,616 $ 4,125 $ 4,311 $ 10,142 $ 23,755 $ 42,333 $ 6,283
[1] Total amount of US$300 million includes own shares purchased from owners of Rio Tinto plc as per the cash flow statement of US$252 million and a financial liability recognised in respect of an irrevocable contract in place as at 30 June 2017 to cover the share buy-back programme.
[2] Net of contributions received from employees for share options.
[3] The impact of the transition to new accounting standards; IFRS 9 ‘Financial Instruments’ and IFRS 15 ‘Revenue from contracts with customers’ on 1 January 2018 is discussed on pages F-12 to F-21.
[4] Refer to Group statement of comprehensive income for further details.
[5] Total amount of US$1,444 million includes own shares purchased from owners of Rio Tinto plc as per the cash flow statement of US$1,501 million adjusted for the movement in a financial liability recognised in respect of irrevocable contracts in place as at 30 June 2018 and 31 December 2017 to cover the share buy-back programme.