Equity - Schedule of Company's Outstanding Shares of Common Stock (Parenthetical) (Detail)	6 Months Ended
Jun. 30, 2017
Class Of Stock Disclosures [Abstract]
Percentage of compensation paid on restricted stock granted	25.00%

Percentage of compensation paid on restricted stock granted.

No definition available.

Name:	breit_PercentageOfCompensationPaidOnRestrictedStockGranted
Namespace Prefix:	breit_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration