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Noncontrolling Interests - Narrative (Details)	6 Months Ended
	Jun. 30, 2019 shares
Noncontrolling Interest [Line Items]
Percentage of noncontrolling interests based on weighted average shares outstanding (percent)	12.59%
Limited partnership units issued	31,500,000
Implied EA-1 operating partnership units issued in consideration	200,000
Partnership unit exchange (in shares)	1
Griffin Capital Essential Asset Operating Partnership, L.P.
Noncontrolling Interest [Line Items]
Percentage of noncontrolling interests based on total shares (percent)	11.15%

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- Definition

Limited Partners' Capital Account, Units Issued in Exchange for Property

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- Definition

Partnership unit exchange in share.

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- Definition

Percentage of noncontrolling interests based on weighted average shares.

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- Definition

The number of limited partner units issued.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055

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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.

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

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