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INCOME TAXES: Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Dec. 31, 2017 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |
Provisional estimated net tax benefit | $ 68.9 | $ 68.9
Income tax benefit (expense), due to Tax Cuts and Jobs Act of 2017 | $ 7.6 |

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- Definition Tax Cuts and Jobs Act of 2017, Income Tax Expense (Benefit) + References No definition available. + Details
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- Definition Amount of income tax expense (benefit) from continuing operations attributable to an adjustment of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32639-109319 + Details
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