| Equity and Long-Term Incentive Compensation Plans (Cash Long-Term Incentive Plan) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| Mar. 31, 2014
 Vesting_Installments | Mar. 31, 2013 | Mar. 31, 2014 | Mar. 31, 2013 | |
| Cash Long-Term Incentive Plan | ||||
| Cash-based long-term incentive plan, approved amount | $ 65.3 | $ 65.3 | ||
| Cash-based long-term incentive plan, committed amount | 107.8 | 107.8 | ||
| Cash Long-Term Incentive Plan | ||||
| Cash Long-Term Incentive Plan | ||||
| Cash long-term incentive plan, number of equal vesting installments | 4 | |||
| Cash long-term incentive plan, percentage of equal vesting installments | 25.00% | |||
| Cash long-term incentive plan, vesting period | 4 years | |||
| Cash long-term incentive program, compensation expense | 7.3 | 3.6 | 18.7 | 7.1 | 
| Cash long-term incentive plan, unrecognized compensation balance | $ 93.7 | $ 93.7 | ||
| X | ||||||||||
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- Definition Deferred Compensation Arrangement with Individual, Number of Equal Vesting Installments No definition available. 
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| X | ||||||||||
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- Definition Deferred Compensation Arrangement with Individual, Percentage Of Equal Vesting Installments No definition available. 
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| X | ||||||||||
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- Definition Deferred Compensation Arrangement With Individual, Unrecognized Compensation Liability No definition available. 
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| X | ||||||||||
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- Definition Deferred Compensation Arrangement with Individual, Vesting Period No definition available. 
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| X | ||||||||||
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- Definition Long-Term Incentive Plan, Approved Amount No definition available. 
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| X | ||||||||||
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- Definition Long-Term Incentive Plan, Committed Amount No definition available. 
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| X | ||||||||||
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- Definition The compensation expense recognized during the period pertaining to the deferred compensation arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Details 
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