v3.25.2
Report of the directors financial review risk report - Wholesale analysis (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Disclosure of financial assets [line items]    
ECL estimates, % weight assigned 100.00%  
Gross carrying amount | Wholesale    
Disclosure of financial assets [line items]    
Financial assets $ 2,007,707 $ 1,958,010
Gross carrying amount | Wholesale | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets 1,838,904 1,830,264
Gross carrying amount | Wholesale | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets 168,803 127,746
Allowance for ECL | Wholesale    
Disclosure of financial assets [line items]    
Financial assets (2,423) (2,205)
Allowance for ECL | Wholesale | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (707) (689)
Allowance for ECL | Wholesale | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (1,685) (1,516)
Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (2,202) (2,031)
Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (665) (632)
Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (1,537) (1,399)
Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (1,808) (1,612)
Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (536) (494)
Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (1,272) (1,118)
Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (3,091) (2,877)
Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (837) (797)
Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (2,254) (2,080)
Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Increase (decrease) in ECL 1,400  
Financial assets (5,133) (6,555)
Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (915) (803)
Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets $ (4,218) (5,751)
UK | Wholesale    
Disclosure of financial assets [line items]    
ECL estimates, % weight assigned 100.00%  
UK | Gross carrying amount | Wholesale    
Disclosure of financial assets [line items]    
Financial assets $ 439,863 432,160
UK | Allowance for ECL | Wholesale    
Disclosure of financial assets [line items]    
Financial assets (618) (717)
UK | Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (579) (667)
UK | Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (521) (526)
UK | Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (732) (850)
UK | Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (1,082) (2,389)
US | Gross carrying amount | Wholesale    
Disclosure of financial assets [line items]    
Financial assets 199,656 202,888
US | Allowance for ECL | Wholesale    
Disclosure of financial assets [line items]    
Financial assets (215) (216)
US | Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (191) (201)
US | Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (169) (205)
US | Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (298) (247)
US | Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets $ (515) (461)
Hong Kong | Wholesale    
Disclosure of financial assets [line items]    
ECL estimates, % weight assigned 100.00%  
Hong Kong | Gross carrying amount | Wholesale    
Disclosure of financial assets [line items]    
Financial assets $ 467,487 450,966
Hong Kong | Allowance for ECL | Wholesale    
Disclosure of financial assets [line items]    
Financial assets (814) (659)
Hong Kong | Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (758) (616)
Hong Kong | Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (607) (465)
Hong Kong | Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (966) (906)
Hong Kong | Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (1,524) (1,496)
Mainland China | Gross carrying amount | Wholesale    
Disclosure of financial assets [line items]    
Financial assets 134,762 137,960
Mainland China | Allowance for ECL | Wholesale    
Disclosure of financial assets [line items]    
Financial assets (236) (178)
Mainland China | Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (190) (141)
Mainland China | Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (121) (84)
Mainland China | Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (387) (329)
Mainland China | Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (681) (886)
Mexico | Gross carrying amount | Wholesale    
Disclosure of financial assets [line items]    
Financial assets 35,806 34,713
Mexico | Allowance for ECL | Wholesale    
Disclosure of financial assets [line items]    
Financial assets (91) (69)
Mexico | Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (82) (61)
Mexico | Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (65) (46)
Mexico | Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (110) (86)
Mexico | Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (273) (302)
UAE | Gross carrying amount | Wholesale    
Disclosure of financial assets [line items]    
Financial assets 60,542 58,909
UAE | Allowance for ECL | Wholesale    
Disclosure of financial assets [line items]    
Financial assets (59) (51)
UAE | Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (57) (49)
UAE | Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (49) (40)
UAE | Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (65) (58)
UAE | Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (101) (120)
France | Gross carrying amount | Wholesale    
Disclosure of financial assets [line items]    
Financial assets 191,111 184,591
France | Allowance for ECL | Wholesale    
Disclosure of financial assets [line items]    
Financial assets (128) (82)
France | Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (118) (80)
France | Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (102) (69)
France | Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (143) (97)
France | Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (190) (125)
Other geographies | Gross carrying amount | Wholesale    
Disclosure of financial assets [line items]    
Financial assets 478,479 455,823
Other geographies | Allowance for ECL | Wholesale    
Disclosure of financial assets [line items]    
Financial assets (262) (234)
Other geographies | Allowance for ECL | Wholesale | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (227) (216)
Other geographies | Allowance for ECL | Wholesale | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (172) (176)
Other geographies | Allowance for ECL | Wholesale | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (390) (304)
Other geographies | Allowance for ECL | Wholesale | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets $ (767) $ (774)