Pension and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2017

HSBC North America Pension Plan [Member]

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

Components of Net Periodic Benefit Cost

	Three Months Ended June 30,						Six Months Ended June 30,
	2017			2016			2017			2016
	(in millions)
Interest cost on projected benefit obligation	$	18		$	17		$	36		$	35
Expected return on plan assets	(22		)	(22		)	(43		)	(42		)
Amortization of net actuarial loss	8			9			18			19
Administrative costs	1			2			2			3
Pension expense	$	5		$	6		$	13		$	15

Postretirement Plans Other Than Pensions [Member]

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

Components of Net Periodic Benefit Cost

The following table reflects the components of the net periodic postretirement benefit cost:

	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
	(in millions)
Interest cost on accumulated benefit obligation	$	—	$	—	$	1	$	1
Net periodic postretirement benefit cost	$	—	$	—	$	1	$	1