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 9 Months Ended
Mar. 31, 2013
Vesting_Installments
Mar. 31, 2013
Cash Long-Term Incentive Plan    
Cash-based long-term incentive plan, committed amount $ 61.5 $ 61.5
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 3.6 7.1
Cash long-term incentive plan, unrecognized compensation balance $ 53.9 $ 53.9