Annual report pursuant to Section 13 and 15(d)

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

v3.10.0.1
Equity and Long-Term Incentive Compensation Plans - Cash-Based Long-Term Incentive Compensation (Details) - Cash Long-Term Incentive Plan
$ in Millions
 12 Months Ended
Jun. 30, 2018
USD ($)
Installment
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Cash Long-Term Incentive Plan      
Cash-based long-term incentive plan, granted amount $ 64.9 $ 96.7  
Executive deferred compensation program, compensation expense 52.4 $ 48.8 $ 44.6
Cash long-term incentive plan, unrecognized compensation balance $ 132.1    
Maximum      
Cash Long-Term Incentive Plan      
Cash long-term incentive plan, equal vesting installments | Installment 4    
Cash long-term incentive plan, percentage of equal vesting installments 25.00%    
Cash long-term incentive plan, vesting period 4 years    
Minimum      
Cash Long-Term Incentive Plan      
Cash long-term incentive plan, equal vesting installments | Installment 3    
Cash long-term incentive plan, percentage of equal vesting installments 33.33%    
Cash long-term incentive plan, vesting period 3 years