Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2017

Long-term Debt, Unclassified [Abstract]

Schedule of long-term debt instruments

The composition of long-term debt is presented in the following table. Interest rates on floating rate notes are determined periodically by formulas based on certain money market rates or, in certain instances, by minimum interest rates as specified in the agreements governing the issues. Interest rates and maturity dates in effect at December 31, 2017 are shown in the below table.

				At December 31,
	Maturity Date Range	Interest Rate Range	Interest Rate Weighted Average	2017		2016
				(in millions)
Issued or acquired by HSBC USA:
Senior debt:
Fixed-rate notes	2018-2024	1.63% - 3.50%	2.30%	$	10,185	$	11,423
Floating-rate notes	2018-2019	2.02% - 2.55%	2.22%	849		1,748
Structured notes	2018-2045	1.54% - 3.99%	2.38%	9,137		7,849
Total senior debt				20,171		21,020
Subordinated debt:
Fixed-rate notes	2020-2097	5.00% - 9.30%	6.15%	1,170		1,171
Floating-rate notes	2025	3.66%	3.66%	850		850
Total subordinated debt				2,020		2,021
Mark-to-market adjustment on fair value option debt				1,125		337
Total issued or acquired by HSBC USA				23,316		23,378
Issued or acquired by HSBC Bank USA and its subsidiaries:
Senior debt:
Floating-rate notes	2019-2040	0.93% - 3.13%	2.88%	4,031		4,031
Structured notes	2018-2024	1.54% - 4.74%	1.98%	393		218
FHLB advances - floating-rate	2018-2036	1.42% - 2.18%	1.84%	3,100		5,700
Total senior debt				7,524		9,949
Subordinated fixed-rate notes	2018-2039	4.88% - 7.00%	5.90%	3,572		4,103
Long term debt issued by VIE - fixed-rate	2018	17.20%	17.20%	73		79
Mark-to-market adjustment on fair value option debt				481		230
Total issued or acquired by HSBC Bank USA and its subsidiaries				11,650		14,361
Total long-term debt				$	34,966	$	37,739

Maturities of long-term debt

Maturities of long-term debt at December 31, 2017 were as follows:

	(in millions)
2018	$	8,548
2019	5,103
2020	6,994
2021	3,599
2022	1,647
Thereafter	9,075
Total	$	34,966