Employee benefit plans

9 Months Ended

Sep. 30, 2021

Retirement Benefits [Abstract]

Employee benefit plans

Employee benefit plans

The components of net periodic benefit (credit) cost are presented below. The service cost component is reflected in staff expense, whereas the remaining components are reflected in other expense.

Net periodic benefit (credit) cost	Quarter ended
	Sept. 30, 2021						June 30, 2021						Sept. 30, 2020
(in millions)	Domestic pension benefits		Foreign pension benefits		Health care benefits		Domestic pension benefits		Foreign pension benefits		Health care benefits		Domestic pension benefits		Foreign pension benefits		Health care benefits
Service cost	$	—	$	4	$	—	$	—	$	3	$	—	$	—	$	3	$	—
Interest cost	35		6		1		34		7		1		39		7		2
Expected return on assets	(75)		(9)		(2)		(75)		(8)		(1)		(80)		(10)		(2)
Other	24		3		—		24		3		—		22		2		(1)
Net periodic benefit (credit) cost	$	(16)	$	4	$	(1)	$	(17)	$	5	$	—	$	(19)	$	2	$	(1)

Net periodic benefit (credit) cost	Year-to-date
	Sept. 30, 2021						Sept. 30, 2020
(in millions)	Domestic pension benefits		Foreign pension benefits		Health care benefits		Domestic pension benefits		Foreign pension benefits		Health care benefits
Service cost	$	—	$	11	$	—	$	—	$	9	$	—
Interest cost	103		19		3		117		20		4
Expected return on assets	(225)		(26)		(5)		(239)		(29)		(5)
Other	73		10		—		65		8		(2)
Net periodic benefit (credit) cost	$	(49)	$	14	$	(2)	$	(57)	$	8	$	(3)