Quarterly report pursuant to Section 13 or 15(d)

Equity and Long-Term Incentive Compensation Plans (Cash Long-Term Incentive Plan) (Details)

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Equity and Long-Term Incentive Compensation Plans (Cash Long-Term Incentive Plan) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Dec. 31, 2012
Vesting_Installments
Dec. 31, 2012
Cash Long-Term Incentive Plan    
Cash-based long-term incentive plan, committed amount $ 60.3 $ 60.3
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   3.5
Cash long-term incentive plan, unrecognized compensation balance $ 56.4 $ 56.4