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Share-Based Plans (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 5 years    
HSBC Sharesave Plan [Member] | Employee Stock Purchase Plans [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum monthly contribution per employee, amount $ 400    
HSBC Sharesave Plan - 1 Year [Member] | Employee Stock Purchase Plans [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 1 year    
HSBC Sharesave Plan - 3 Year [Member] | Employee Stock Purchase Plans [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
HSBC Sharesave Plan - 5 Year [Member] | Employee Stock Purchase Plans [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 5 years    
HSBC Group Share Plan [Member] | Restricted Stock Units (RSUs) [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years 3 years 3 years
Total compensation expense recognized 4,000,000 9,000,000 10,000,000
Future compensation cost related to grants not yet fully vested $ 13,000,000    
Future compensation cost related to grants not yet fully vested, period for recognition 1 year 6 months 4 days    
HSBC Group Share Plan [Member] | Restricted Stock Units (RSUs) [Member] | Minimum [Member] | Key Employees [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
HSBC Group Share Plan [Member] | Restricted Stock Units (RSUs) [Member] | Maximum [Member] | Key Employees [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 5 years    
HSBC Group Share Plan [Member] | Performance Shares [Member] | Minimum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 12 months    
HSBC Group Share Plan [Member] | Performance Shares [Member] | Maximum [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 30 months