v3.25.2
Report of the directors financial review risk report - Retail analysis (Details) - Retail - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Gross carrying amount    
Disclosure of financial assets [line items]    
Financial assets $ 415,278 $ 392,361
Gross carrying amount | Mortgages    
Disclosure of financial assets [line items]    
Financial assets 368,934 347,910
Gross carrying amount | Mortgages | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets 328,914 311,875
Gross carrying amount | Mortgages | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets 37,499 33,761
Gross carrying amount | Mortgages | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets 2,521 2,274
Gross carrying amount | Credit cards    
Disclosure of financial assets [line items]    
Financial assets 23,779 23,290
Gross carrying amount | Credit cards | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets 19,784 19,915
Gross carrying amount | Credit cards | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets 3,708 3,107
Gross carrying amount | Credit cards | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets 287 267
Gross carrying amount | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets 22,565 21,161
Gross carrying amount | Other financial assets measured at amortised cost | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets 19,717 18,574
Gross carrying amount | Other financial assets measured at amortised cost | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets 2,285 2,005
Gross carrying amount | Other financial assets measured at amortised cost | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets 563 583
Allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (2,613) (2,413)
Allowance for ECL | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (2,539) (2,351)
Allowance for ECL | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (2,452) (2,285)
Allowance for ECL | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (2,662) (2,440)
Allowance for ECL | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (3,567) (3,928)
Increase (decrease) in ECL 400  
Allowance for ECL | Mortgages    
Disclosure of financial assets [line items]    
Financial assets (481) (440)
Allowance for ECL | Mortgages | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (55) (51)
Allowance for ECL | Mortgages | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (144) (126)
Allowance for ECL | Mortgages | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (282) (263)
Allowance for ECL | Mortgages | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (459) (425)
Allowance for ECL | Mortgages | Consensus Central scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (49) (47)
Allowance for ECL | Mortgages | Consensus Central scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (133) (117)
Allowance for ECL | Mortgages | Consensus Central scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (278) (261)
Allowance for ECL | Mortgages | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (436) (405)
Allowance for ECL | Mortgages | Consensus Upside scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (46) (43)
Allowance for ECL | Mortgages | Consensus Upside scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (120) (107)
Allowance for ECL | Mortgages | Consensus Upside scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (269) (255)
Allowance for ECL | Mortgages | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (502) (456)
Allowance for ECL | Mortgages | Consensus Downside scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (63) (58)
Allowance for ECL | Mortgages | Consensus Downside scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (149) (129)
Allowance for ECL | Mortgages | Consensus Downside scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (290) (269)
Allowance for ECL | Mortgages | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (736) (708)
Allowance for ECL | Mortgages | Downside 2 scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (119) (129)
Allowance for ECL | Mortgages | Downside 2 scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (287) (275)
Allowance for ECL | Mortgages | Downside 2 scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (330) (304)
Allowance for ECL | Credit cards    
Disclosure of financial assets [line items]    
Financial assets (1,229) (1,116)
Allowance for ECL | Credit cards | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (320) (276)
Allowance for ECL | Credit cards | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (695) (655)
Allowance for ECL | Credit cards | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (215) (185)
Allowance for ECL | Credit cards | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (1,188) (1,086)
Allowance for ECL | Credit cards | Consensus Central scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (313) (267)
Allowance for ECL | Credit cards | Consensus Central scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (660) (634)
Allowance for ECL | Credit cards | Consensus Central scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (215) (185)
Allowance for ECL | Credit cards | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (1,157) (1,064)
Allowance for ECL | Credit cards | Consensus Upside scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (299) (258)
Allowance for ECL | Credit cards | Consensus Upside scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (643) (621)
Allowance for ECL | Credit cards | Consensus Upside scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (215) (185)
Allowance for ECL | Credit cards | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (1,246) (1,124)
Allowance for ECL | Credit cards | Consensus Downside scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (331) (284)
Allowance for ECL | Credit cards | Consensus Downside scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (700) (656)
Allowance for ECL | Credit cards | Consensus Downside scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (215) (185)
Allowance for ECL | Credit cards | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (1,642) (1,915)
Allowance for ECL | Credit cards | Downside 2 scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (513) (701)
Allowance for ECL | Credit cards | Downside 2 scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (907) (1,027)
Allowance for ECL | Credit cards | Downside 2 scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (223) (188)
Allowance for ECL | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets (902) (856)
Allowance for ECL | Other financial assets measured at amortised cost | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (224) (216)
Allowance for ECL | Other financial assets measured at amortised cost | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (385) (360)
Allowance for ECL | Other financial assets measured at amortised cost | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (293) (279)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (891) (839)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Central scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (218) (204)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Central scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (381) (355)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Central scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (293) (279)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (859) (816)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Upside scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (204) (193)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Upside scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (363) (343)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Upside scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (293) (279)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (915) (860)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Downside scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (232) (217)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Downside scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (391) (363)
Allowance for ECL | Other financial assets measured at amortised cost | Consensus Downside scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (293) (279)
Allowance for ECL | Other financial assets measured at amortised cost | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (1,189) (1,305)
Allowance for ECL | Other financial assets measured at amortised cost | Downside 2 scenario allowance for ECL | Non-credit impaired | Stage 1    
Disclosure of financial assets [line items]    
Financial assets (415) (532)
Allowance for ECL | Other financial assets measured at amortised cost | Downside 2 scenario allowance for ECL | Non-credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (473) (483)
Allowance for ECL | Other financial assets measured at amortised cost | Downside 2 scenario allowance for ECL | Credit impaired | Stage 2    
Disclosure of financial assets [line items]    
Financial assets (301) (290)
UK | Gross carrying amount | Mortgages    
Disclosure of financial assets [line items]    
Financial assets 181,192 163,541
UK | Gross carrying amount | Credit cards    
Disclosure of financial assets [line items]    
Financial assets 7,990 7,415
UK | Gross carrying amount | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets 9,404 8,249
UK | Allowance for ECL | Mortgages    
Disclosure of financial assets [line items]    
Financial assets (150) (126)
UK | Allowance for ECL | Mortgages | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (138) (117)
UK | Allowance for ECL | Mortgages | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (130) (107)
UK | Allowance for ECL | Mortgages | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (158) (132)
UK | Allowance for ECL | Mortgages | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (293) (288)
UK | Allowance for ECL | Credit cards    
Disclosure of financial assets [line items]    
Financial assets (339) (280)
UK | Allowance for ECL | Credit cards | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (336) (275)
UK | Allowance for ECL | Credit cards | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (317) (265)
UK | Allowance for ECL | Credit cards | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (338) (276)
UK | Allowance for ECL | Credit cards | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (414) (447)
UK | Allowance for ECL | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets (267) (241)
UK | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (263) (233)
UK | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (238) (217)
UK | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (275) (243)
UK | Allowance for ECL | Other financial assets measured at amortised cost | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (346) (351)
Mexico | Gross carrying amount | Mortgages    
Disclosure of financial assets [line items]    
Financial assets 8,187 7,482
Mexico | Gross carrying amount | Credit cards    
Disclosure of financial assets [line items]    
Financial assets 2,294 2,227
Mexico | Gross carrying amount | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets 3,821 3,722
Mexico | Allowance for ECL | Mortgages    
Disclosure of financial assets [line items]    
Financial assets (187) (165)
Mexico | Allowance for ECL | Mortgages | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (183) (162)
Mexico | Allowance for ECL | Mortgages | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (175) (155)
Mexico | Allowance for ECL | Mortgages | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (190) (168)
Mexico | Allowance for ECL | Mortgages | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (237) (215)
Mexico | Allowance for ECL | Credit cards    
Disclosure of financial assets [line items]    
Financial assets (384) (337)
Mexico | Allowance for ECL | Credit cards | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (379) (333)
Mexico | Allowance for ECL | Credit cards | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (374) (330)
Mexico | Allowance for ECL | Credit cards | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (385) (338)
Mexico | Allowance for ECL | Credit cards | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (479) (423)
Mexico | Allowance for ECL | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets (430) (419)
Mexico | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (426) (416)
Mexico | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (422) (413)
Mexico | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (431) (422)
Mexico | Allowance for ECL | Other financial assets measured at amortised cost | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (593) (593)
Hong Kong | Gross carrying amount | Mortgages    
Disclosure of financial assets [line items]    
Financial assets 105,399 106,866
Hong Kong | Gross carrying amount | Credit cards    
Disclosure of financial assets [line items]    
Financial assets 9,097 9,419
Hong Kong | Gross carrying amount | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets 6,194 6,210
Hong Kong | Allowance for ECL | Mortgages    
Disclosure of financial assets [line items]    
Financial assets (7) (5)
Hong Kong | Allowance for ECL | Mortgages | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (6) (5)
Hong Kong | Allowance for ECL | Mortgages | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (5) (4)
Hong Kong | Allowance for ECL | Mortgages | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (8) (5)
Hong Kong | Allowance for ECL | Mortgages | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (12) (10)
Hong Kong | Allowance for ECL | Credit cards    
Disclosure of financial assets [line items]    
Financial assets (289) (293)
Hong Kong | Allowance for ECL | Credit cards | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (257) (275)
Hong Kong | Allowance for ECL | Credit cards | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (253) (268)
Hong Kong | Allowance for ECL | Credit cards | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (301) (300)
Hong Kong | Allowance for ECL | Credit cards | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (496) (770)
Hong Kong | Allowance for ECL | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets (110) (106)
Hong Kong | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (108) (102)
Hong Kong | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (107) (101)
Hong Kong | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (112) (105)
Hong Kong | Allowance for ECL | Other financial assets measured at amortised cost | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (137) (249)
UAE | Gross carrying amount | Mortgages    
Disclosure of financial assets [line items]    
Financial assets 2,097 1,993
UAE | Gross carrying amount | Credit cards    
Disclosure of financial assets [line items]    
Financial assets 545 536
UAE | Gross carrying amount | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets 658 688
UAE | Allowance for ECL | Mortgages    
Disclosure of financial assets [line items]    
Financial assets (7) (8)
UAE | Allowance for ECL | Mortgages | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (7) (8)
UAE | Allowance for ECL | Mortgages | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (7) (8)
UAE | Allowance for ECL | Mortgages | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (7) (8)
UAE | Allowance for ECL | Mortgages | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (7) (8)
UAE | Allowance for ECL | Credit cards    
Disclosure of financial assets [line items]    
Financial assets (34) (31)
UAE | Allowance for ECL | Credit cards | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (33) (31)
UAE | Allowance for ECL | Credit cards | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (32) (31)
UAE | Allowance for ECL | Credit cards | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (34) (31)
UAE | Allowance for ECL | Credit cards | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (39) (35)
UAE | Allowance for ECL | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets (18) (17)
UAE | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (17) (17)
UAE | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (17) (17)
UAE | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (18) (17)
UAE | Allowance for ECL | Other financial assets measured at amortised cost | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (20) (19)
US | Gross carrying amount | Mortgages    
Disclosure of financial assets [line items]    
Financial assets 17,736 16,965
US | Gross carrying amount | Credit cards    
Disclosure of financial assets [line items]    
Financial assets 188 193
US | Allowance for ECL | Mortgages    
Disclosure of financial assets [line items]    
Financial assets (7) (6)
US | Allowance for ECL | Mortgages | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (7) (6)
US | Allowance for ECL | Mortgages | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (7) (6)
US | Allowance for ECL | Mortgages | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (8) (6)
US | Allowance for ECL | Mortgages | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (10) (8)
US | Allowance for ECL | Credit cards    
Disclosure of financial assets [line items]    
Financial assets (14) (15)
US | Allowance for ECL | Credit cards | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (14) (14)
US | Allowance for ECL | Credit cards | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (13) (14)
US | Allowance for ECL | Credit cards | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (14) (15)
US | Allowance for ECL | Credit cards | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (16) (17)
Other geographies | Gross carrying amount | Mortgages    
Disclosure of financial assets [line items]    
Financial assets 54,323 51,064
Other geographies | Gross carrying amount | Credit cards    
Disclosure of financial assets [line items]    
Financial assets 3,665 3,500
Other geographies | Gross carrying amount | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets 2,488 2,292
Other geographies | Allowance for ECL | Mortgages    
Disclosure of financial assets [line items]    
Financial assets (123) (131)
Other geographies | Allowance for ECL | Mortgages | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (117) (127)
Other geographies | Allowance for ECL | Mortgages | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (112) (124)
Other geographies | Allowance for ECL | Mortgages | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (131) (136)
Other geographies | Allowance for ECL | Mortgages | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (177) (180)
Other geographies | Allowance for ECL | Credit cards    
Disclosure of financial assets [line items]    
Financial assets (170) (162)
Other geographies | Allowance for ECL | Credit cards | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (169) (159)
Other geographies | Allowance for ECL | Credit cards | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (167) (156)
Other geographies | Allowance for ECL | Credit cards | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (173) (164)
Other geographies | Allowance for ECL | Credit cards | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (198) (223)
Other geographies | Allowance for ECL | Other financial assets measured at amortised cost    
Disclosure of financial assets [line items]    
Financial assets (78) (72)
Other geographies | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Central scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (77) (72)
Other geographies | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Upside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (74) (69)
Other geographies | Allowance for ECL | Other financial assets measured at amortised cost | Consensus Downside scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets (78) (73)
Other geographies | Allowance for ECL | Other financial assets measured at amortised cost | Downside 2 scenario allowance for ECL    
Disclosure of financial assets [line items]    
Financial assets $ (92) $ (93)