Receivables - Aging Analysis of Past Due Loans (Parenthetical) (Detail)	Sep. 30, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment, Past Due [Line Items]
Real estate secured receivables modified and re-aged	57.00%	57.00%

Real estate secured receivables modified and re-aged.

No definition available.

Name:	hsbcfc_RealEstateSecuredReceivablesModifiedAndReaged
Namespace Prefix:	hsbcfc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant