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Organization (Details) ft² in Millions, $ in Millions	Apr. 01, 2015 USD ($) ft² project property shares	Dec. 31, 2015 property
Office Properties
Business Acquisition
Number of real estate properties		54
Media and Entertainment Properties
Business Acquisition
Number of real estate properties		2
EOP Northern California Portfolio
Business Acquisition
Area of real estate property | ft²	8.2
Payments to acquire businesses | $	$ 1,750
Shares issued as consideration for business combination | shares	63,474,791
EOP Northern California Portfolio | Office Building
Business Acquisition
Number of real estate properties acquired	26
Number of real estate properties	26
EOP Northern California Portfolio | Development Parcel
Business Acquisition
Real estate development projects acquired | project	2
Number of real estate properties	2

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Number of shares of equity interests issued or issuable to acquire entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 1
-Subparagraph (b)(4)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585

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