Organization and Business Purpose - Additional Information (Detail)	9 Months Ended
	Sep. 30, 2018 USD ($) Investment Position Segment shares
Organization and business activities.
Date of formation	Nov. 16, 2015
Common stock, shares authorized, amount | $	$ 5,000,000,000
Net proceeds from issuance of common stock | $	$ 3,800,000,000
Common stock, shares issued	367,532,939
Number of real estate investments | Investment	49
Number of reportable segments | Segment	5
Real Estate-Related Securities [Member]
Organization and business activities.
Number of positions | Position	93
Class S Shares [Member]
Organization and business activities.
Common stock, shares issued	238,809,136
Class T Shares [Member]
Organization and business activities.
Common stock, shares issued	19,250,630
Class D Shares [Member]
Organization and business activities.
Common stock, shares issued	24,293,198
Class I Shares [Member]
Organization and business activities.
Common stock, shares issued	85,179,975
IPO [Member]
Organization and business activities.
Common stock, shares authorized, amount | $	$ 4,000,000,000
Distribution Reinvestment Plan [Member]
Organization and business activities.
Common stock, shares authorized, amount | $	$ 1,000,000,000