Organization - Narrative (Details) $ in Millions	Sep. 20, 2017 USD ($) stock_class
Follow-on Offering
Subsidiary, Sale of Stock [Line Items]
Offering amount in sales of shares	$ 2,200.0
Number of new classes of common stock | stock_class	4
SMInimum holdnf period for qualified IPO shares under program	4 years
Minimum holding period for redemption of stock	1 year
Primary Offering
Subsidiary, Sale of Stock [Line Items]
Offering amount in sales of shares	$ 2,000.0
Distribution Reinvestment Plan
Subsidiary, Sale of Stock [Line Items]
Common stock of the Company pursuant to the distribution reinvestment plan (in shares)	$ 200.0