CONDENSED STATEMENT OF CHANGES IN SHAREHOLDER'S EQUITY (Unaudited) (Parenthetical)	Sep. 30, 2020 shares
Class B Ordinary Shares [Member]
Shareholder's Equity
Ordinary shares subject to forfeiture (in shares)	1,250,000

Number of shares of common stock subject to forfeiture if the over-allotment option was not exercised by the underwriters.

No definition available.

Name:	agc_CommonStockShareSubjectToForfeiture
Namespace Prefix:	agc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant