CONDENSED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (Unaudited) (Parenthetical) - shares		3 Months Ended
Sep. 17, 2020	Sep. 30, 2020
Public Shares [Member]
Stockholders' Equity
Units issued (in shares)		23,000,000
Private Placement Warrant [Member]
Stockholders' Equity
Warrants issued (in shares)	6,600,000	6,600,000

Number of new units issued during the period. Each unit consists of one share of Class A common stock and one redeemable warrant.

No definition available.

Name:	sbg_UnitsIssuedDuringPeriodSharesNewIssues
Namespace Prefix:	sbg_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration