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Share-based payments (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |
Charge has been recognised in income statement for Rio Tinto's share-based incentive plans, and the related liability (for cash-settled plans) | The charge that has been recognised in the income statement for Rio Tinto’s share-based incentive plans, and the related liability (for cash-settled plans), is set out in the table below.
| Charge recognised for the year | Liability at the end of the year
| 2017 | 2016 | 2015 | 2017 | 2016
| US$m | US$m | US$m | US$m | US$m
Equity-settled plans | 88 | 116 | 128 | - | -
Cash-settled plans | 3 | - | - | 15 | 1
Total | 91 | 116 | 128 | 15 | 1
Summary of options outstanding and exercisable | A summary of the status of the Companies’ equity-settled share option plans at 31 December 2017 is presented below.
Options outstanding and exercisable at 31 December 2017 | Number | Weighted average exercise price per option £/A$ | Weighted average remaining contractual life Years | Aggregate intrinsic value 2017 US$m
Rio Tinto plc Share Option Plan (exercise price £16 - £43) | 164,119 | 32 | 2.56 | 2
Rio Tinto Limited Share Option Plan (exercise price A $33) | 24,647 | 33 | 1.21 | 1
| 188,766 |  |  | 3
Performance share plans [member] |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |
Summary of non-vested and vested shares | Performance Share Plans
| Rio Tinto plc awards | Rio Tinto Limited awards
| 2017 Number | Weighted average fair value at grant date 2017 £ | 2016 Number | Weighted average fair value at grant date 2016 £ | 2017 Number | Weighted average fair value at grant date 2017 A$ | 2016 Number | Weighted average fair value at grant date 2016 A$
Non-vested shares at 1 January | 2,883,053 | 18.27 | 2,988,454 | 21.29 | 1,590,957 | 37.52 | 2,048,823 | 41.13
Awarded | 1,198,677 | 24.64 | 1,085,974 | 12.81 | 529,776 | 45.84 | 535,418 | 28.66
Forfeited | (199,435) | 16.28 | (603,871) | 17.22 | (36,716) | 36.59 | (526,212) | 36.18
Failed performance conditions | (161,966) | 16.25 | (203,491) | 24.61 | (113,857) | 30.89 | (161,937) | 44.71
Vested | (165,055) | 21.51 | (384,013) | 24.61 | (84,284) | 40.79 | (305,135) | 44.71
Transfers from equity to cash-settled(a) | - | - | - | - | (276,722) | 40.11 | - | -
Non-vested shares at 31 December | 3,555,274 | 20.47 | 2,883,053 | 18.27 | 1,609,154 | 40.13 | 1,590,957 | 37.52
| 2017 Number | Weighted average share price 2017 £ | 2016 Number | Weighted average share price 2016 £ | 2017 Number | Weighted average share price 2017 A$ | 2016 Number | Weighted average share price 2016 A$
Vested awards settled in shares during the year (including dividend shares applied on vesting) | 188,383 | 31.04 | 368,623 | 19.08 | 73,311 | 63.09 | 284,507 | 42.99
Vested awards settled in cash during the year (including dividend shares applied on vesting) | - | - | 486 | 19.00 | 5,010 | 62.81 | 847 | 43.47
(a) | In 2017, an agreement was reached between the Group and a former director to settle any of their future vested awards in cash rather than equity.
Share Incentive Plans |
Disclosure Of Terms And Conditions Of Sharebased Payment Arrangement [Line Items] |
Summary of non-vested and vested shares | Notes to the 2017 financial statements continued 43 Share-based payments continued Management Share Plans, Bonus Deferral Plans, Global Employee Share Plans and UK Share Plan (combined)
| Rio Tinto plc awards(a) | Rio Tinto Limited awards
| 2017 Number | Weighted average fair value at grant date 2017 £ | 2016 Number | Weighted average fair value at grant date 2016 £ | 2017 Number | Weighted average fair value at grant date 2017 A$ | 2016 Number | Weighted average fair value at grant date 2016 A$
Non-vested awards at 1 January | 3,305,966 | 26.00 | 3,211,727 | 29.70 | 2,986,080 | 53.32 | 2,993,396 | 58.09
Awarded | 1,499,374 | 32.50 | 1,673,017 | 20.62 | 1,156,078 | 61.05 | 1,405,348 | 45.27
Forfeited | (159,669) | 29.46 | (246,806) | 23.02 | (127,905) | 53.61 | (164,020) | 54.48
Cancelled | (51,773) | 25.82 | - | - | (95,203) | 51.18 | - | -
Vested | (1,120,806) | 30.41 | (1,331,972) | 28.72 | (985,813) | 60.06 | (1,248,644) | 55.54
Non-vested shares at 31 December | 3,473,092 | 27.23 | 3,305,966 | 26.00 | 2,933,237 | 54.15 | 2,986,080 | 53.32
Comprising: |  |  |  |  |  |  |  |
– Management Share Plan | 1,897,318 | 27.99 | 1,668,590 | 25.79 | 1,617,838 | 55.42 | 1,530,814 | 53.88
– Bonus Deferral Plan | 281,994 | 25.53 | 312,767 | 23.24 | 153,966 | 52.83 | 148,158 | 50.25
– Global Employee Share Plan | 1,196,937 | 26.42 | 1,223,144 | 26.90 | 1,161,433 | 52.54 | 1,307,108 | 53.03
– UK Share Plan | 96,843 | 27.14 | 101,465 | 27.00 | - | - |  |
| 2017 Number | Weighted average fair value at grant date 2017 £ | 2016 Number | Weighted average fair value at grant date 2016 £ | 2017 Number | Weighted average fair value at grant date 2017 A$ | 2016 Number | Weighted average fair value at grant date 2016 A$
Vested awards settled in shares during the year (including dividend shares applied on vesting) |  |  |  |  |  |  |  |
– Management Share Plan | 653,776 | 35.33 | 758,776 | 20.07 | 577,083 | 67.93 | 701,965 | 43.93
– Bonus Deferral Plan | 170,036 | 34.44 | 112,623 | 30.36 | 88,644 | 69.98 | 113,407 | 56.78
– Global Employee Share Plan | 382,585 | 33.56 | 344,072 | 24.33 | 466,308 | 65.10 | 332,010 | 48.69
– UK Share Plan | 11,120 | 34.56 | 21,082 | 21.92 | - | - | - | -
(a) | Awards of Rio Tinto American Depository Receipts (ADRs) under the Global Employee Share Plan are included within the totals for Rio Tinto plc awards for the purpose of these tables

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