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Commitments and Contingencies - Multiemployer Pension and Defined Contribution Plans Narrative (Details) - Building Service 32BJ - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2016
Pension Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Plan contributions | $ 272.3 | $ 257.8 | $ 249.5
Health Plans |  |  |
Multiemployer Plans [Line Items] |  |  |
Plan contributions | $ 1,400.0 | $ 1,300.0 | $ 1,200.0

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of contributions made to multiemployer plan by all employers who participate in plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 80 -Section 50 -Paragraph 7 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65877416&loc=SL14450678-114947 + Details
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- Details
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