Condensed Consolidated Statements of Changes in Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock [Member] Class S Shares [Member]	Common Stock [Member] Class T Shares [Member]	Common Stock [Member] Class D Shares [Member]	Common Stock [Member] Class I Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit and Cumulative Distributions [Member]	Total Stockholders' Equity [Member]	Non-controlling Interests [Member] Third Party Joint Ventures [Member]	Non-controlling Interests [Member] BREIT OP Unitholders [Member]
Beginning Balance at Dec. 31, 2017	$ 1,509,639	$ 1,301	$ 56	$ 40	$ 307	$ 1,616,720	$ (132,633)	$ 1,485,791	$ 23,848
Common stock issued	593,701	325	42	28	163	593,143		593,701
Offering costs	(37,361)					(37,361)		(37,361)
Distribution reinvestment	16,497	11			4	16,482		16,497
Common stock repurchased	(2,296)	(1)			(1)	(2,294)		(2,296)
Amortization of restricted stock grants/compensation awards	25					25		25
Net loss	(49,264)						(47,548)	(47,548)	(1,716)
Distributions declared on common stock	(28,384)						(28,384)	(28,384)
Contributions from non-controlling interests	6,940								6,940
Distributions to non-controlling interests	(581)								(581)
Allocation to redeemable non-controlling interest	(883)					(883)		(883)
Ending Balance at Mar. 31, 2018	2,008,033	1,636	98	68	473	2,185,832	(208,565)	1,979,542	28,491
Common stock issued	732,958	343	50	100	190	732,275		732,958
Offering costs	(46,491)					(46,491)		(46,491)
Distribution reinvestment	22,004	14	1		5	21,984		22,004
Common stock repurchased	(8,818)	(7)			(1)	(8,810)		(8,818)
Amortization of restricted stock grants/compensation awards	25					25		25
Net loss	(51,696)						(50,482)	(50,482)	(1,214)
Distributions declared on common stock	(38,043)						(38,043)	(38,043)
Contributions from non-controlling interests	4,334								4,334
Distributions to non-controlling interests	(646)								(646)
Allocation to redeemable non-controlling interest	(573)					(573)		(573)
Ending Balance at Jun. 30, 2018	2,621,087	1,986	149	168	667	2,884,242	(297,090)	2,590,122	30,965
Beginning Balance at Dec. 31, 2018	3,914,954	2,770	233	304	1,083	4,327,444	(587,548)	3,744,286	75,592	$ 95,076
Common stock issued	844,119	414	38	75	245	843,347		844,119
Offering costs	(50,847)					(50,847)		(50,847)
Distribution reinvestment	42,034	24	2	2	11	41,995		42,034
Common stock repurchased	(45,510)	(18)	(6)		(18)	(45,468)		(45,510)
Amortization of restricted stock grants/compensation awards	600				1	99		100		500
Net loss	(49,819)						(46,846)	(46,846)	(2,036)	(937)
Distributions declared on common stock	(69,542)						(69,542)	(69,542)
Contributions from non-controlling interests	9,608								4,894	4,714
Distributions to non-controlling interests	(2,813)								(1,277)	(1,536)
Allocation to redeemable non-controlling interest	(1,080)					(1,080)		(1,080)
Ending Balance at Mar. 31, 2019	4,591,704	3,190	267	381	1,322	5,115,490	(703,936)	4,416,714	77,173	97,817
Beginning Balance at Dec. 31, 2018	3,914,954	2,770	233	304	1,083	4,327,444	(587,548)	3,744,286	75,592	95,076
Common stock repurchased	(105,700)
Allocation to redeemable non-controlling interest	(1,400)
Ending Balance at Jun. 30, 2019	6,376,375	3,812	319	529	2,286	6,969,300	(845,511)	6,130,735	113,725	131,915
Beginning Balance at Mar. 31, 2019	4,591,704	3,190	267	381	1,322	5,115,490	(703,936)	4,416,714	77,173	97,817
Common stock issued	1,967,111	610	51	146	986	1,965,318		1,967,111
Offering costs	(103,027)					(103,027)		(103,027)
Distribution reinvestment	51,860	28	2	3	14	51,813		51,860
Common stock repurchased	(60,157)	(16)	(1)	(1)	(37)	(60,032)		(60,087)		(70)
Amortization of restricted stock grants/compensation awards	600				1	99		100		500
Net loss	(52,710)						(50,704)	(50,704)	(970)	(1,036)
Distributions declared on common stock	(90,871)						(90,871)	(90,871)
Contributions from non-controlling interests	77,798								41,049	36,749
Distributions to non-controlling interests	(5,572)								(3,527)	(2,045)
Allocation to redeemable non-controlling interest	(361)					(361)		(361)
Ending Balance at Jun. 30, 2019	$ 6,376,375	$ 3,812	$ 319	$ 529	$ 2,286	$ 6,969,300	$ (845,511)	$ 6,130,735	$ 113,725	$ 131,915