Pension and Postretirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2020

Pension and Postretirement Benefit Plans

Components of net periodic benefit cost (benefit)

	Three months ended March 31,
	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2020		2019		2020		2019		2020		2019
Net periodic benefit cost (benefit)
Operating expense
Service cost	$	66	$	62	$	38	$	33	$	11	$	11
Non-operating expense
Interest cost	$	124	$	155	$	31	$	39	$	16	$	21
Expected return on plan assets		(255)		(260)		(77)		(75)		(20)		(20)
Amortization of transition asset		—		—		1		—		—		—
Amortization of prior service benefit		(6)		(6)		(1)		(3)		(8)		(7)
Amortization of net actuarial loss		134		91		31		20		12		9
Settlements, curtailments, special termination benefits and other		—		—		—		—		1		—
Total non-operating expense (benefit)		(3)		(20)		(15)		(19)		1		3
Total net periodic benefit cost (benefit)	$	63	$	42	$	23	$	14	$	12	$	14