Organization and Business Purpose - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2019 USD ($) Property Position Segment
Organization and business activities.
Date of formation	Nov. 16, 2015
Common stock, shares authorized, amount	$ 5,000,000,000
Aggregate gross offering proceeds	4,900,000,000
Net proceeds from issuance of common stock	$ 5,500,000,000
Number of owned properties | Property	491
Number of reportable segments | Segment	5
Real Estate-Related Securities and Loans [Member]
Organization and business activities.
Number of positions | Position	118
IPO [Member]
Organization and business activities.
Common stock, shares authorized, amount	$ 4,000,000,000
IPO [Member] | Maximum [Member]
Organization and business activities.
Common stock, shares authorized, amount	10,000,000,000
Distribution Reinvestment Plan [Member]
Organization and business activities.
Common stock, shares authorized, amount	1,000,000,000
Distribution Reinvestment Plan [Member] | Maximum [Member]
Organization and business activities.
Common stock, shares authorized, amount	2,000,000,000
Follow On Offering [Member] | Maximum [Member]
Organization and business activities.
Common stock, shares authorized, amount	$ 12,000,000,000