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Equity and Long-Term Incentive Compensation Plans - Cash-Based Long-Term Incentive Compensation (Details) - Cash Long-Term Incentive Plan $ in Millions | 12 Months Ended
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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 |  |

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- Definition The compensation expense recognized during the period pertaining to the deferred compensation arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20015-108363 + Details
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