Amount of contributions made to the multiemployer plan by all employers who participate in the plan. A multiemployer plan is a pension or postretirement benefit plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-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

Name:	us-gaap_MultiemployerPlansPlanContributions
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Commitments and Contingencies - Multiemployer Pension and Defined Contribution Plans Narrative (Details) $ in Millions	1 Months Ended	12 Months Ended
	Jul. 31, 2014 property	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)
Multiemployer Plans [Line Items]
Number of properties acquired \| property	2
Building Service 32BJ [Member] \| Pension Plans [Member]
Multiemployer Plans [Line Items]
Plan contributions		$ 249.5	$ 242.3	$ 224.5
Building Service 32BJ [Member] \| Health Plans [Member]
Multiemployer Plans [Line Items]
Plan contributions		$ 1,200.0	$ 1,100.0	$ 1,000.0