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Share-based payment reserve - Assumption and Valuation of share based expenses (Details) - ZAR (R) | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Share-based payment transaction |  |  |
Equity-settled share-based payment | R 3,776,000,000 | R 463,000,000 | R 123,000,000
Sasol Khanyisa share transaction |  |  |
Share-based payment transaction |  |  |
Number of SOLBE1 shares | 5,369,070 |  |
Number of SOL shares | 2,082,520 |  |
Number of Sasol Khanyisa shares | 53,007,284 |  |
Total IFRS expense | R 6,518,000,000 |  |
Equity-settled share-based payment | R 2,953,000,000 |  |
Risk - free interest rate | 8.08% |  |
Expected volatility | 28.49% |  |
Sasol Khanyisa share transaction | Minimum |  |  |
Share-based payment transaction |  |  |
Expected dividend yield | 1.80% |  |
Sasol Khanyisa share transaction | Maximum |  |  |
Share-based payment transaction |  |  |
Expected dividend yield | 10.10% |  |
SOLBE1 Election 1 for 4 |  |  |
Share-based payment transaction |  |  |
Number of SOLBE1 shares | 245,741 |  |
Weighted average fair value | R 386.00 |  |
Total IFRS expense | 95,000,000 |  |
Equity-settled share-based payment | R 95,000,000 |  |
SOLBE1, Public, Groups 1 for 10 |  |  |
Share-based payment transaction |  |  |
Number of SOLBE1 shares | 2,727,281 |  |
Weighted average fair value | R 370.00 |  |
Total IFRS expense | 1,009,000,000 |  |
Equity-settled share-based payment | 1,009,000,000 |  |
SSA (Tier 2 and Khanyisa Public) |  |  |
Share-based payment transaction |  |  |
Strike price | R 313.25 |  |
Khanyisa Public |  |  |
Share-based payment transaction |  |  |
Number of Sasol Khanyisa shares | 26,503,642 |  |
Weighted average fair value | R 66.48 |  |
Total IFRS expense | 1,762,000,000 |  |
Equity-settled share-based payment | R 1,762,000,000 |  |
Tier 2 - Khanyisa ESOP |  |  |
Share-based payment transaction |  |  |
Number of Sasol Khanyisa shares | 26,503,642 |  |
Weighted average fair value | R 66.48 |  |
Total IFRS expense | 1,762,000,000 |  |
Equity-settled share-based payment | R 35,000,000 |  |
Remaining vesting period | 5 years 9 months 18 days |  |
Tier 2 - Khanyisa ESOP | Minimum |  |  |
Share-based payment transaction |  |  |
Vesting Life Of Share Based Awards | 3 years |  |
Tier 2 - Khanyisa ESOP | Maximum |  |  |
Share-based payment transaction |  |  |
Vesting Life Of Share Based Awards | 10 years |  |
Tier 1 - Khanyisa Employee Share Ownership Plan (ESOP) |  |  |
Share-based payment transaction |  |  |
Equity-settled share-based payment | R 52,000,000 |  |
Remaining vesting period | 2 years 10 months 24 days |  |
Vesting Life Of Share Based Awards | 3 years |  |
ESOP - Tier1 |  |  |
Share-based payment transaction |  |  |
Number of SOL shares | 2,082,520 |  |
Weighted average fair value | R 481.50 |  |
Total IFRS expense | 1,003,000,000 |  |
Equity-settled share-based payment | R 27,000,000 |  |
ESOP - Tier1 |  |  |
Share-based payment transaction |  |  |
Number of SOLBE1 shares | 2,396,048 |  |
Weighted average fair value | R 370.00 |  |
Total IFRS expense | 887,000,000 |  |
Equity-settled share-based payment | R 25,000,000 |  |

X
- Definition The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The exercise price of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The percentage of an expected dividend used to calculate the fair value of share options granted. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_a_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of expense arising from equity-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 51 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_51_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The weighted average fair value at the measurement date of granted equity instruments other than share options. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2017-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2017-03-01&anchor=para_47_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of accumulated IFRS expense arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets. + References No definition available. + Details
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- Definition It represents the number of Sasol Khanyisa shares. + References No definition available. + Details
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- Definition Remaining Period which the right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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