Income Tax	9 Months Ended
Mar. 31, 2019
Income Tax [Abstract]
Income Tax	19. Income tax Income tax in interim periods For the purposes of interim financial reporting, the Company determines the appropriate income tax provision by first applying the effective tax rate expected to be applicable for the full fiscal year to ordinary income. This amount is then adjusted for the tax effect of significant unusual items, for instance, changes in tax law, valuation allowances and non-deductible transaction-related expenses that are reported separately, and have an impact on the tax charge. The cumulative effect of any change in the enacted tax rate, if and when applicable, on the opening balance of deferred tax assets and liabilities is also included in the tax charge as a discrete event in the interim period in which the enactment date occurs. For the three and nine months ended March 31, 2019, the Company's effective tax rate was adversely impacted by the valuation allowances created related to the deferred tax assets recognized regarding net operating losses incurred by the Company's South African businesses, the non-deductible impairment losses, the DNI disposal loss, and non-deductible expenses, including transaction-related expenditure and non-deductible interest on its South African long-term debt facility, which was partially offset by tax expense recorded by the Company's profitable businesses in South Africa and South Korea. The deferred tax impact of the change in the fair value of the Company's investment in Cell C also impacted the Company's effective rate for fiscal 2019, as this amount is recorded at a lower rate (at a capital gains rate) than the South African statutory rate. The March 31, 2019, carrying value of the Company's investment in Cell C is less than its initial cost and therefore it has a capital gains benefit for tax purposes, however, the Company does not expect to generate any significant capital gains in the foreseeable future and has provided a valuation allowance of $3.6 million related to this capital gains benefit deferred tax asset. The Company's effective tax rate for the three and nine months ended March 31, 2018, was 40.3% and 42.0%, respectively, and was higher than the South African statutory rate as a result of an impairment loss, non-deductible expenses (including transaction-related expenditure and non-deductible interest on our South African long-term facility), the impact of the changes in U.S. federal statutory tax rates described below and for the nine months ended March 31, 2018, a valuation allowance provided related to an allowance for doubtful working capital finance receivables created. The deferred tax impact of the change in the fair value of the Company's investment in Cell C also impacted the Company's effective rate for fiscal 2018, as this amount is recorded at a lower rate (at a capital gains rate) than the South African statutory rate. Recent Tax Legislation On December 22, 2017, the Tax Cuts and Jobs Act (the "TCJA"), was enacted into law, which significantly changes existing U.S. tax law and includes numerous provisions that affect the Company's business, such as imposing a one-time transition tax on deemed repatriation of deferred foreign income, reducing the U.S. federal statutory tax rate, and adopting a territorial tax system. During the year ended June 30, 2018, the TCJA required the Company to incur a transition tax on deferred foreign income not previously subject to U.S. income tax at a rate of 15.5% for foreign cash and certain other net current assets, and 8% on the remaining income. The TCJA also reduced the U.S. federal statutory tax rate from 35% to 21% effective January 1, 2018. The TCJA includes a provision to tax global intangible low taxed income ("GILTI") of foreign subsidiaries which is effective for the Company beginning July 1, 2018. The TCJA was effective in the third quarter of fiscal year 2018. As of March 31, 2019, the Company has not completed its accounting for the estimated tax effects of the TCJA. Due to the timing of the enactment and the complexity in applying the provisions of the TCJA, the provisional net charge is subject to revisions as the Company continues to complete its analysis of the TCJA, collect and prepare necessary data, and interpret additional guidance issued by standard-setting and regulatory bodies. Adjustments may materially impact the Company's provision for income taxes and effective tax rate in the period in which the adjustments are made. The Company has calculated its Transition Tax liability as of June 30, 2018, and recorded a Transition Tax, before the application of any foreign tax credits, of $56.9 million, and has no liability after the application of generated foreign tax credits. In fact, the Company believes that it may generate excess foreign tax credits based on its preliminary calculations. The Company re-measured its deferred taxes to reflect the reduced rate that will apply when these deferred taxes are settled or realized in future periods. The TCJA subjects a U.S. corporation to tax on its GILTI. Due to the complexity of the new GILTI tax rules, the Company continues to evaluate this provision of the TCJA and the application of GAAP. Under GAAP, the Company has the option to make an accounting policy election of either (i) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred (the "period cost method") or (ii) factoring such amounts into a company's measurement of its deferred taxes (the "deferred method"). The Company has elected the period cost method and will record U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred. The Company is not yet able to reasonably estimate the effect of this provision of the TCJA on it because whether it expects to have future U.S. inclusions in taxable income related to GILTI depends on a number of different aspects of the Company's estimated future results of global operations. Therefore, the Company has not made any adjustments related to potential GILTI tax in its financial statements. Uncertain tax positions There were no significant changes in the Company's uncertain tax positions during the three and nine months ended March 31, 2019. As of March 31, 2019, the Company had accrued interest related to uncertain tax positions of approximately $0.1 million on its balance sheet. The Company does not expect changes related to its unrecognized tax benefits will have a significant impact on its results of operations or financial position in the next 12 months. As of March 31, 2019 and June 30, 2018, the Company had unrecognized tax benefits of $1.0 million and $0.8 million, respectively, all of which would impact the Company's effective tax rate. The Company files income tax returns mainly in South Africa, South Korea, Germany, Hong Kong, India, the United Kingdom, Botswana and in the U.S. federal jurisdiction. As of March 31, 2019, the Company's South African subsidiaries are no longer subject to income tax examination by the South African Revenue Service for periods before June 30, 2014. The Company is subject to income tax in other jurisdictions outside South Africa, none of which are individually material to its financial position, statement of cash flows, or results of operations.

19. Income tax

Income tax in interim periods

For the purposes of interim financial reporting, the Company determines the appropriate income tax provision by first applying the effective tax rate expected to be applicable for the full fiscal year to ordinary income. This amount is then adjusted for the tax effect of significant unusual items, for instance, changes in tax law, valuation allowances and non-deductible transaction-related expenses that are reported separately, and have an impact on the tax charge. The cumulative effect of any change in the enacted tax rate, if and when applicable, on the opening balance of deferred tax assets and liabilities is also included in the tax charge as a discrete event in the interim period in which the enactment date occurs.

For the three and nine months ended March 31, 2019, the Company's effective tax rate was adversely impacted by the valuation allowances created related to the deferred tax assets recognized regarding net operating losses incurred by the Company's South African businesses, the non-deductible impairment losses, the DNI disposal loss, and non-deductible expenses, including transaction-related expenditure and non-deductible interest on its South African long-term debt facility, which was partially offset by tax expense recorded by the Company's profitable businesses in South Africa and South Korea. The deferred tax impact of the change in the fair value of the Company's investment in Cell C also impacted the Company's effective rate for fiscal 2019, as this amount is recorded at a lower rate (at a capital gains rate) than the South African statutory rate. The March 31, 2019, carrying value of the Company's investment in Cell C is less than its initial cost and therefore it has a capital gains benefit for tax purposes, however, the Company does not expect to generate any significant capital gains in the foreseeable future and has provided a valuation allowance of $3.6 million related to this capital gains benefit deferred tax asset.

The Company's effective tax rate for the three and nine months ended March 31, 2018, was 40.3% and 42.0%, respectively, and was higher than the South African statutory rate as a result of an impairment loss, non-deductible expenses (including transaction-related expenditure and non-deductible interest on our South African long-term facility), the impact of the changes in U.S. federal statutory tax rates described below and for the nine months ended March 31, 2018, a valuation allowance provided related to an allowance for doubtful working capital finance receivables created. The deferred tax impact of the change in the fair value of the Company's investment in Cell C also impacted the Company's effective rate for fiscal 2018, as this amount is recorded at a lower rate (at a capital gains rate) than the South African statutory rate.

Recent Tax Legislation

On December 22, 2017, the Tax Cuts and Jobs Act (the "TCJA"), was enacted into law, which significantly changes existing U.S. tax law and includes numerous provisions that affect the Company's business, such as imposing a one-time transition tax on deemed repatriation of deferred foreign income, reducing the U.S. federal statutory tax rate, and adopting a territorial tax system. During the year ended June 30, 2018, the TCJA required the Company to incur a transition tax on deferred foreign income not previously subject to U.S. income tax at a rate of 15.5% for foreign cash and certain other net current assets, and 8% on the remaining income. The TCJA also reduced the U.S. federal statutory tax rate from 35% to 21% effective January 1, 2018. The TCJA includes a provision to tax global intangible low taxed income ("GILTI") of foreign subsidiaries which is effective for the Company beginning July 1, 2018.

The TCJA was effective in the third quarter of fiscal year 2018. As of March 31, 2019, the Company has not completed its accounting for the estimated tax effects of the TCJA. Due to the timing of the enactment and the complexity in applying the provisions of the TCJA, the provisional net charge is subject to revisions as the Company continues to complete its analysis of the TCJA, collect and prepare necessary data, and interpret additional guidance issued by standard-setting and regulatory bodies. Adjustments may materially impact the Company's provision for income taxes and effective tax rate in the period in which the adjustments are made.

The Company has calculated its Transition Tax liability as of June 30, 2018, and recorded a Transition Tax, before the application of any foreign tax credits, of $56.9 million, and has no liability after the application of generated foreign tax credits. In fact, the Company believes that it may generate excess foreign tax credits based on its preliminary calculations.

The Company re-measured its deferred taxes to reflect the reduced rate that will apply when these deferred taxes are settled or realized in future periods. The TCJA subjects a U.S. corporation to tax on its GILTI. Due to the complexity of the new GILTI tax rules, the Company continues to evaluate this provision of the TCJA and the application of GAAP. Under GAAP, the Company has the option to make an accounting policy election of either (i) treating taxes due on future U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred (the "period cost method") or (ii) factoring such amounts into a company's measurement of its deferred taxes (the "deferred method"). The Company has elected the period cost method and will record U.S. inclusions in taxable income related to GILTI as a current-period expense when incurred. The Company is not yet able to reasonably estimate the effect of this provision of the TCJA on it because whether it expects to have future U.S. inclusions in taxable income related to GILTI depends on a number of different aspects of the Company's estimated future results of global operations. Therefore, the Company has not made any adjustments related to potential GILTI tax in its financial statements.

Uncertain tax positions

There were no significant changes in the Company's uncertain tax positions during the three and nine months ended March 31, 2019. As of March 31, 2019, the Company had accrued interest related to uncertain tax positions of approximately $0.1 million on its balance sheet.

The Company does not expect changes related to its unrecognized tax benefits will have a significant impact on its results of operations or financial position in the next 12 months.

As of March 31, 2019 and June 30, 2018, the Company had unrecognized tax benefits of $1.0 million and $0.8 million, respectively, all of which would impact the Company's effective tax rate. The Company files income tax returns mainly in South Africa, South Korea, Germany, Hong Kong, India, the United Kingdom, Botswana and in the U.S. federal jurisdiction. As of March 31, 2019, the Company's South African subsidiaries are no longer subject to income tax examination by the South African Revenue Service for periods before June 30, 2014. The Company is subject to income tax in other jurisdictions outside South Africa, none of which are individually material to its financial position, statement of cash flows, or results of operations.