Dividends - Schedule of dividends payable (Parenthetical) (Details) - shares		12 Months Ended
May 01, 2019	Dec. 31, 2023
Preferred Stock Issue [Member]
Disclosure Of Interim Dividends Paid [Line Items]
Number of preferred shares converted into common shares	17,482,000	17,482,000

Number Of Preferred Shares Converted into Common Shares.

No definition available.

Name:	shg_NumberOfPreferredSharesConvertedIntoCommonShares
Namespace Prefix:	shg_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration