Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2015

HSBC North America Pension Plan [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]

Components of Net Periodic Benefit Cost

The components of pension expense for the defined benefit pension plan recorded in our consolidated statement of income and shown in the table below reflect the portion of pension expense of the combined HSBC North America Pension Plan (either the "HBSC North America Pension Plan" or the "Plan") which has been allocated to us.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2015			2014			2015			2014
	(in millions)
Service cost – benefits earned during the period	$	2		$	1		$	5		$	3
Interest cost on projected benefit obligation	18			17			51			53
Expected return on plan assets	(22		)	(22		)	(68		)	(64		)
Amortization of net actuarial loss	10			8			29			27
Pension expense	$	8		$	4		$	17		$	19

Postretirement Plans Other Than Pensions [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]

Components of Net Periodic Benefit Cost

The components of net periodic benefit cost for our postretirement plans other than pension are as follows:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2015		2014		2015		2014
	(in millions)
Interest cost on accumulated benefit obligation	$	1	$	1	$	2	$	2
Amortization of net actuarial gain	—		—		—		(1		)
Net periodic postretirement benefit cost	$	1	$	1	$	2	$	1