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Post-retirement benefit obligations - Reconciliation PBO, RF Contributions (Details) - ZAR (R) R in Millions | 12 Months Ended
--- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Gain (loss) recognised in other comprehensive income | R (1) | R (50) | R 63
Pension |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | 6,638 |  |
Ending balance | 6,548 | 6,638 |
Reimbursement rights recognised in long-term receivables | 305 | 268 |
Gain (loss) recognised in other comprehensive income | (1) | 50 |
Pension | Benefit obligation |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | 56,282 | 56,329 |
Movements recognised in the income statement: | 6,274 | 5,864 |
current service cost | 1,414 | 1,297 |
past service cost |  | 21 |
interest cost | 4,860 | 4,546 |
Actuarial (gains) losses recognised in other comprehensive income: | (2,488) | (2,734) |
arising from changes in demographic assumptions | 20 | (3) |
arising from changes in financial assumptions | (2,638) | (2,774) |
arising from change in actuarial experience | 130 | 43 |
Member contributions | 447 | 411 |
Benefits paid | (2,875) | (2,504) |
Transferred to assets held for sale | (30) |  |
Translation of foreign operations | 695 | (1,084) |
Ending balance | 58,305 | 56,282 | 56,329
Pension | Funded benefit obligation |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | 49,421 |  |
Ending balance | 50,390 | 49,421 |
Pension | Unfunded benefit obligation |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | 6,861 |  |
Ending balance | 7,915 | 6,861 |
Pension | South Africa |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | (622) |  |
Ending balance | (582) | (622) |
Pension | South Africa | Benefit obligation |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | 46,508 | 44,823 |
Movements recognised in the income statement: | 5,678 | 5,277 |
current service cost | 1,028 | 927 |
interest cost | 4,650 | 4,350 |
Actuarial (gains) losses recognised in other comprehensive income: | (2,950) | (1,803) |
arising from changes in financial assumptions | (2,950) | (1,803) |
Member contributions | 447 | 411 |
Benefits paid | (2,398) | (2,200) |
Ending balance | 47,285 | 46,508 | 44,823
Pension | South Africa | Funded benefit obligation |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | 46,508 |  |
Ending balance | 47,285 | 46,508 |
Pension | Foreign Countries |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | 7,260 |  |
Ending balance | 7,130 | 7,260 |
Pension | Foreign Countries | Benefit obligation |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | 9,774 | 11,506 |
Movements recognised in the income statement: | 596 | 587 |
current service cost | 386 | 370 |
past service cost |  | 21 |
interest cost | 210 | 196 |
Actuarial (gains) losses recognised in other comprehensive income: | 462 | (931) |
arising from changes in demographic assumptions | 20 | (3) |
arising from changes in financial assumptions | 312 | (971) |
arising from change in actuarial experience | 130 | 43 |
Benefits paid | (477) | (304) |
Transferred to assets held for sale | (30) |  |
Translation of foreign operations | 695 | (1,084) |
Ending balance | 11,020 | 9,774 | R 11,506
Pension | Foreign Countries | Funded benefit obligation |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | 2,913 |  |
Ending balance | 3,105 | 2,913 |
Pension | Foreign Countries | Unfunded benefit obligation |  |  |
Disclosure of net defined benefit liability (asset) [line items] |  |  |
Beginning balance | 6,861 |  |
Ending balance | R 7,915 | R 6,861 |

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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in demographic assumptions that result in remeasurements of the net defined benefit liability (asset). Demographic assumptions deal with matters such as: (a) mortality; (b) rates of employee turnover, disability and early retirement; (c) the proportion of plan members with dependants who will be eligible for benefits; (d) the proportion of plan members who will select each form of payment option available under the plan terms; and (e) claim rates under medical plans. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c_ii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from changes in financial assumptions that result in remeasurements of the net defined benefit liability (asset). Financial assumptions deal with items such as: (a) the discount rate; (b) benefit levels, excluding any cost of the benefits to be met by employees, and future salary; (c) in the case of medical benefits, future medical costs, including claim handling costs (ie the costs that will be incurred in processing and resolving claims, including legal and adjuster's fees); and (d) taxes payable by the plan on contributions relating to service before the reporting date or on benefits resulting from that service. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c_iii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in a net defined benefit liability (asset) resulting from actuarial gains (losses) arising from experience adjustments that result in remeasurements of the net defined benefit liability (asset). Experience adjustments deal with the effects of differences between the previous actuarial assumptions and what has actually occurred. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from contributions to a defined benefit plan by plan participants. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_f&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from employee service in the current period. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_a&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 decrease (increase) in a net defined benefit liability (asset) resulting from the remeasurement of that net defined benefit liability (asset). [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in reimbursement rights resulting from the remeasurement of reimbursement rights. [Refer: Reimbursement rights, at fair value] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_e&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 140 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_140_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from past service cost. Past service cost is the change in the present value of the defined benefit obligation for employee service in prior periods, resulting from a plan amendment (the introduction or withdrawal of, or changes to, a defined benefit plan) or a curtailment (a significant reduction by the entity in the number of employees covered by a plan). [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_d&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 141 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_141_g&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of the entity's rights to the reimbursement by another party of some or all of the expenditure required to settle a defined benefit obligation recognised as a separate asset and measured at fair value. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2017-01-01 -Paragraph 140 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=19&date=2017-03-01&anchor=para_140_b&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from amounts recorded in the income statement in the current period. + References No definition available. + Details
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