CONSOLIDATED STATEMENT OF INCOME - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019		Sep. 30, 2018
Interest income:
Loans		$ 733	$ 659	$ 2,192		$ 1,894
Securities		296	292	898		823
Trading securities		85	54	215		156
Short-term investments		136	164	485		479
Other		23	19	61		57
Total interest income		1,273	1,188	3,851		3,409
Interest expense:
Deposits		408	283	1,121		763
Short-term borrowings		79	45	209		121
Long-term debt		277	291	895		831
Other		6	10	21		28
Total interest expense		770	629	2,246		1,743
Net interest income		503	559	1,605		1,666
Provision for credit losses		94	20	198		(96)
Net interest income after provision for credit losses		409	539	1,407		1,762
Other revenues:
Other revenues		298	320	873		954
Trading revenue		178	154	434		509
Other securities gains (losses), net		46	(5)	76		10
Gain (loss) on instruments designated at fair value and related derivatives		(19)	29	(45)		63
Other income (loss)		(14)	(9)	(17)		9
Total other revenues	[1]	486	486	1,312	[2]	1,536	[2]
Operating expenses:
Salaries and employee benefits		195	208	626		627
Support services from HSBC affiliates		394	399	1,185		1,215
Occupancy expense, net		41	49	134		137
Goodwill impairment		365	0	365		0
Other expenses		111	134	320		879
Total operating expenses	[2]	1,106	790	2,630		2,858	[3]
Income (loss) before income tax		(211)	235	89		440
Income tax expense		39	58	109		232
Net income (loss)		(250)	177	(20)		208
Credit card fees, net [Member]
Other revenues:
Other revenues		18	12	48		38
Trust and investment management fees [Member]
Other revenues:
Other revenues		34	31	95		103
Other fees and commissions [Member]
Other revenues:
Other revenues		155	171	464		515
Servicing and other fees from HSBC affiliates [Member]
Other revenues:
Other revenues		$ 88	$ 103	$ 257		$ 289

[1] See Note 15, "Business Segments," for a reconciliation of total other revenues on a U.S. GAAP basis to other operating income for each business segment under the Group Reporting Basis.

[2] Represents adjustments associated with differences between U.S. GAAP and the Group Reporting Basis.

[3] Represents differences in financial statement presentation between U.S. GAAP and the Group Reporting Basis.