SHAREHOLDERS' EQUITY: Additional Paid-In Capital (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Stockholders' Equity [Line Items]
Share-based compensation	$ 2.2	$ 2.6	$ 4.6	$ 4.6
Stock repurchased during period (in shares)	2,879,414		3,973,093
Remaining authorized repurchase amount	$ 167.0		$ 167.0
Additional Paid-in Capital
Stockholders' Equity [Line Items]
Increase (decrease) in additional paid-in capital			(65.5)
Stock repurchased during the period, less adjustments			68.1
Adjustments to APIC offset by other stock-based compensation activity			2.0
Stock repurchased during period, value	$ 48.9		$ 68.3

Stock Repurchased During Period, Value, Excluding Stock-based Compensation Adjustments

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[Line Items] for Stockholders' Equity [Table]

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Amount of decrease in additional paid in capital (APIC) resulting from a tax deficiency associated with a share-based compensation plan other than an employee stock ownership plan (ESOP).

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Amount remaining of a stock repurchase plan authorized.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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The increase (decrease) in stockholders' equity during the period.

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