Noncontrolling Interests (Details) - shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Noncontrolling Interest [Line Items]
Percentage of noncontrolling interest based on weighted average shares	12.02%
Units issued related to property contributions (shares)	31,600,000
Repurchase of noncontrolling interest (shares)	6,000	0
Implied EA-1 operating partnership units issued in consideration	200,000
Partnership unite exchange, in shares	1
Griffin Capital Essential Asset Operating Partnership, L.P.
Noncontrolling Interest [Line Items]
Percentage of noncontrolling interests based on total shares	12.08%