Stock-Based Compensation (Details Textual) (USD $) In Millions, except Per Share data, unless otherwise specified	6 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Stock-Based Compensation (Additional Textual) [Abstract]
Maximum period of achievement of performance goals to earn performance units	3 years
Minimum performance period of individual required to earn performance units	3 years
Stock Option [Member]
Stock-Based Compensation (Textual) [Abstract]
Compensation expense related to stock option	$ 2.8	$ 3.5
Unrecognized compensation cost	3.7
Unrecognized compensation costs, weighted average period	2 years 10 months
Weighted average fair value of options granted	$ 10.16	$ 13.79
Share Based Compensation Arrangement by Share Based Payment Award Options Vested in Period	6.9	5.0
Tax benefits resulting from stock-based compensation deductions in excess of amounts reported for financial reporting purposes	1.3	4.5
Cash received from the exercise of capital stock option	6.1	12.7
Tax benefit from the exercise of capital stock option	1.3	2.7
Total Intrinsic value of options exercised	3.4	9.2
Fair market value of shares delivered		0.2
Restricted Stock Units - Time Vesting Performance Vesting [Member]
Stock-Based Compensation (Textual) [Abstract]
Compensation expense related to stock option	10.6	8.4
Unrecognized compensation cost	$ 21.3
Unrecognized compensation costs, weighted average period	2 years 8 months 10 days

Maximum period of achievement of performance goals to earn performance units.

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Share based compensation arrangement by share based payment award options vested in period.

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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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The total fair value of shares issued during the period under a deferred compensation arrangement.

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Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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Amount of cash inflow from realized tax benefit related to deductible compensation cost reported on the entity's tax return for equity instruments in excess of the compensation cost for those instruments recognized for financial reporting purposes.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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