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Related Party Transactions - Supplementary Narrative (Details) $ in Thousands				12 Months Ended
	Jul. 01, 2016 USD ($) ft²	Dec. 16, 2015 ft²	Apr. 01, 2015 USD ($) ft² property project shares	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 01, 2015 ft²
Related Party Transaction [Line Items]
Total consideration				$ 640,800	$ 3,904,977
Blackstone Real Estate Partners
Related Party Transaction [Line Items]
Area of real estate property | ft²		42,371				40,120
Extended term of lease		3 years
Total term of lease		10 years
EOP Northern California Portfolio
Related Party Transaction [Line Items]
Area of real estate property | ft²			8,200,000
Total consideration			$ 3,815,700
Payments to acquire businesses			$ 1,750,000
Shares issued as consideration for business combination | shares			63,474,791
EOP Northern California Portfolio | Office Building
Related Party Transaction [Line Items]
Number of real estate properties acquired | property			26
EOP Northern California Portfolio | Development Parcel
Related Party Transaction [Line Items]
Number of real estate development projects acquired | project			2
11601 Wilshire
Related Party Transaction [Line Items]
Total term of lease	8 years
Total consideration	$ 311,000
Area of leased real estate | ft²	6,638
Annualized rent payment	$ 279

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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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-Glossary Investing Activities
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