Subsequent Events - Initial Public Offerings, Public and Private Offerings (Detail) - USD ($)	Aug. 02, 2017	Jul. 03, 2017	Jul. 01, 2017	Jun. 30, 2017	Jul. 01, 2016	Nov. 25, 2014
Initial Public Offering
Subsequent Event [Line Items]
Issuance of common stock in public offering					$ 2,000,000,000	$ 2,000,000,000
Dollar value of common stock in offering, DRIP shares					$ 500,000,000
Total amount of common stock remaining available for sale				$ 1,997,986,356
Amount remaining available for sale through distribution reinvestment plan				$ 499,986,356
Initial Public Offering | Class T
Subsequent Event [Line Items]
Offering price of common stock per share, primary shares				$ 9.4180	$ 9.4180
Initial Public Offering | Class W
Subsequent Event [Line Items]
Offering price of common stock per share, primary shares				9.0355	$ 9.0355
Initial Public Offering | Class I
Subsequent Event [Line Items]
Offering price of common stock per share, primary shares				$ 10.00
Subsequent Event
Subsequent Event [Line Items]
Issuance of common stock in public offering		$ 1,500,000,000
Dollar value of common stock in offering, DRIP shares		$ 500,000,000
Estimated NAV			$ 10.00
Total amount of common stock remaining available for sale	$ 1,997,972,494
Amount remaining available for sale through distribution reinvestment plan	$ 499,972,494
Subsequent Event | Initial Public Offering
Subsequent Event [Line Items]
Estimated NAV		$ 10.00
Subsequent Event | Initial Public Offering | Class T
Subsequent Event [Line Items]
Offering price of common stock per share, primary shares		10.4712
Subsequent Event | Initial Public Offering | Class W
Subsequent Event [Line Items]
Offering price of common stock per share, primary shares		10.00
Subsequent Event | Initial Public Offering | Class I
Subsequent Event [Line Items]
Offering price of common stock per share, primary shares		$ 10.00