Pension and Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2015

Pension and Postretirement Benefit Plans

Components of net periodic benefit cost (benefit)

	Three months ended September 30,
	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Net periodic benefit cost (benefit)
Service cost	$	73	$	60	$	36	$	36	$	19	$	16
Interest cost		163		169		49		65		25		24
Expected return on plan assets		(267)		(261)		(74)		(79)		(23)		(22)
Amortization of transition (asset) obligation		—		—		—		(1)		—		—
Amortization of prior service cost (benefit)		(6)		1		(3)		(4)		(10)		(12)
Amortization of net actuarial (gain) loss		101		60		34		31		18		14
Net periodic benefit cost (benefit)	$	64	$	29	$	42	$	48	$	29	$	20
Settlements, curtailments, special termination benefits and other		—		—		—		—		—		—
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	$	64	$	29	$	42	$	48	$	29	$	20

	Nine months ended September 30,
	Qualified and Non-qualified
	Pension Benefits								Postretirement
	United States				International				Benefits
(Millions)	2015		2014		2015		2014		2015		2014
Net periodic benefit cost (benefit)
Service cost	$	219	$	180	$	118	$	107	$	62	$	49
Interest cost		491		507		159		194		75		72
Expected return on plan assets		(801)		(783)		(236)		(238)		(68)		(67)
Amortization of transition (asset) obligation		—		—		(1)		(1)		—		—
Amortization of prior service cost (benefit)		(18)		3		(10)		(12)		(26)		(36)
Amortization of net actuarial (gain) loss		305		182		110		93		56		43
Net periodic benefit cost (benefit)	$	196	$	89	$	140	$	143	$	99	$	61
Settlements, curtailments, special termination benefits and other		—		—		(17)		—		—		—
Net periodic benefit cost (benefit) after settlements, curtailments, special termination benefits and other	$	196	$	89	$	123	$	143	$	99	$	61