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Equity and Long-Term Incentive Compensation Plans - Cash Long-Term Incentive Plan (Details) - Cash long-term incentive plan $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) vesting_installment | Dec. 31, 2015 USD ($)
Cash Long-Term Incentive Plan |  |  |  |
Cash-based long-term incentive plan, approved amount | $ 50.3 | $ 47.1 | $ 50.3 | $ 47.1
Cash long-term incentive plan, number of equal vesting installments | vesting_installment |  |  | 4 |
Cash long-term incentive plan, percentage of equal vesting installments (as a percent) |  |  | 25.00% |
Cash long-term incentive plan, vesting period (in years) |  |  | 4 years |
Cash long-term incentive program, compensation expense | 11.2 | $ 11.5 | $ 23.4 | $ 21.4
Cash long-term incentive plan, unrecognized compensation balance | $ 108.4 |  | $ 108.4 |

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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=6415400&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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- Details
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