Equity and Redeemable Non-controlling Interest - Schedule of Company's Outstanding Shares of Common Stock (Detail)	3 Months Ended
	Mar. 31, 2021 shares
Class Of Stock [Line Items]
Beginning balance	1,800,017,000
Common stock issued	250,993,000
Distribution reinvestment	12,869,000
Common stock repurchased	(43,544,000)
Independent directors' restricted stock grant	5,000
Ending balance	2,020,340,000
Class S Shares [Member]
Class Of Stock [Line Items]
Beginning balance	702,853,000
Common stock issued	81,771,000
Distribution reinvestment	5,696,000
Common stock repurchased	(6,799,000)
Ending balance	783,521,000
Class I Shares [Member]
Class Of Stock [Line Items]
Beginning balance	927,080,000
Common stock issued	145,218,000
Distribution reinvestment	5,835,000
Common stock repurchased	(35,388,000)
Independent directors' restricted stock grant	5,000
Ending balance	1,042,750,000
Class T Shares [Member]
Class Of Stock [Line Items]
Beginning balance	45,943,000
Common stock issued	1,383,000
Distribution reinvestment	337,000
Common stock repurchased	(548,000)
Ending balance	47,115,000
Class D Shares [Member]
Class Of Stock [Line Items]
Beginning balance	124,141,000
Common stock issued	22,621,000
Distribution reinvestment	1,001,000
Common stock repurchased	(809,000)
Ending balance	146,954,000