CAPITALIZATION (Details) - USD ($)		9 Months Ended
	Apr. 22, 2020	Sep. 30, 2020	Jan. 08, 2020	Jan. 15, 2016	May 30, 2013
Schedule of Capitalization [Line Items]
Common stock, shares authorized (in shares)	1,000,000,000
Preferred stock, shares authorized (in shares)	50,000,000
Common stock, par value (in usd per share)	$ 0.01
Aggregate redemptions value limit, as a percentage of combined net asset value		5.00%
Aggregate redemptions value including carryover limit, as a percentage of combined net asset value		10.00%
Common stock redemption limit per shareholder, as a percentage of shares held		5.00%
Percentage of net asset value		4.00%
Short term trading penalty period		365 days
Short-term trading discount as percentage of gross proceeds		2.00%
Minimum balance of common stock, threshold to redeem shares		$ 500
RREEF America
Schedule of Capitalization [Line Items]
Underwriting compensation for public offering as percent of gross offering proceeds	10.00%	10.00%
Class A Shares
Schedule of Capitalization [Line Items]
Common stock, shares authorized (in shares)	45,000,000
Common stock, par value (in usd per share)			$ 0.01
Maximum selling commissions as percentage of purchase price	3.00%
Percentage of dealer manager fee	0.55%	0.55%
Percentage of distribution fee	0.50%	0.50%
Class D Shares
Schedule of Capitalization [Line Items]
Common stock, shares authorized (in shares)	45,000,000
Common stock, par value (in usd per share)				$ 0.01
Maximum selling commissions as percentage of purchase price	1.00%
Class I Shares
Schedule of Capitalization [Line Items]
Common stock, shares authorized (in shares)	200,000,000
Common stock, par value (in usd per share)			0.01		$ 0.01
Percentage of dealer manager fee	0.55%	0.55%
Class M-I Shares
Schedule of Capitalization [Line Items]
Common stock, shares authorized (in shares)	200,000,000
Common stock, par value (in usd per share)	$ 0.01
Class N Shares
Schedule of Capitalization [Line Items]
Common stock, shares authorized (in shares)	150,000,000
Common stock, par value (in usd per share)			0.01
Class S Shares
Schedule of Capitalization [Line Items]
Common stock, shares authorized (in shares)	200,000,000
Common stock, par value (in usd per share)	$ 0.01
Maximum selling commissions as percentage of purchase price	3.00%
Percentage of distribution fee	0.85%	0.85%
Duration of distribution fee	7 years	6 years 6 months
Class T Shares
Schedule of Capitalization [Line Items]
Common stock, shares authorized (in shares)	5,000,000
Common stock, par value (in usd per share)			$ 0.01
Maximum selling commissions as percentage of purchase price	3.00%
Percentage of dealer manager fee	2.50%
Percentage of distribution fee	1.00%	1.00%
Duration of distribution fee	3 years	3 years
Underwriting compensation for public offering as percent of gross offering proceeds	8.50%
Class T2 Shares
Schedule of Capitalization [Line Items]
Common stock, shares authorized (in shares)	150,000,000
Common stock, par value (in usd per share)	$ 0.01
Maximum selling commissions as percentage of purchase price	3.00%
Percentage of dealer manager fee	0.50%
Percentage of distribution fee	0.85%	0.85%
Duration of distribution fee	6 years	6 years 6 months
Class Z Shares
Schedule of Capitalization [Line Items]
Common stock, shares authorized (in shares)	5,000,000
Common stock, par value (in usd per share)	$ 0.01