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Significant Accounting Policies (Narrative) (Details) $ in Millions |  |  | 12 Months Ended
--- | --- | --- | ---
Jan. 01, 2018 | Dec. 22, 2017 | Jun. 30, 2018 USD ($) item contract | Jun. 30, 2017 USD ($) item | Jun. 30, 2016 USD ($) item
Significant Accounting Policies [Line Items] |  |  |  |  |
Number of entities required to be consolidated | item |  |  | 0 | 0 | 0
Number of deliverables identified for multiple element arrangements | item |  |  | 2 |  |
Research and development expenditures | $ |  |  | $ 1.8 | $ 2.0 | $ 2.3
Income tax rate |  | 35.00% |  |  |
Undistributed earnings | $ |  |  | $ 545.4 |  |
Minimum probability of tax benefit realization percentage |  |  | 50.00% |  |
South Africa [Member] |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Income tax rate | 28.00% |  | 28.00% | 28.00% | 28.00%
Minimum [Member] |  |  |  |  |
Significant Accounting Policies [Line Items] |  |  |  |  |
Number of contracts in which reinsurers compensate losses arising on contracts it issues | contract |  |  | 1 |  |

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- Definition Number Of Contracts In Which Reinsurers Compensate Losses Arising On Contracts It Issues + References No definition available. + Details
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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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