Pension and Other Postretirement Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2023

Pension Plans

Defined Benefit Plan Disclosure [Line Items]

Net Benefit Costs

The Company has defined benefit pension plans covering eligible employees in the U.S. and in certain of its international subsidiaries. The net periodic benefit cost (credit) of such plans consisted of the following components: 

	Three Months Ended September 30,								Nine Months Ended September 30,
	2023				2022				2023				2022
($ in millions)	U.S.		International		U.S.		International		U.S.		International		U.S.		International
Service cost	$	88	$	48	$	91	$	66	$	239	$	148	$	289	$	213
Interest cost	130		76		123		35		396		225		330		110
Expected return on plan assets	(182)		(131)		(182)		(93)		(553)		(390)		(576)		(292)
Amortization of unrecognized prior service (credit) cost	—		(6)		(8)		(3)		(1)		5		(24)		(10)
Net (gain) loss amortization	—		(1)		10		24		—		(2)		122		73
Termination benefits	1		—		1		—		2		—		2		1
Curtailments	—		—		3		—		5		—		11		—
Settlements	—		—		79		—		26		—		180		—
	$	37	$	(14)	$	117	$	29	$	114	$	(14)	$	334	$	95

Other Postretirement Benefit Plans

Defined Benefit Plan Disclosure [Line Items]

Net Benefit Costs

The Company provides medical benefits, principally to its eligible U.S. retirees and similar benefits to their dependents, through its other postretirement benefit plans. The net credit of such plans consisted of the following components: 

	Three Months Ended September 30,				Nine Months Ended September 30,
($ in millions)	2023		2022		2023		2022
Service cost	$	8	$	11	$	24	$	36
Interest cost	16		11		47		34
Expected return on plan assets	(16)		(21)		(48)		(64)
Amortization of unrecognized prior service credit	(12)		(14)		(37)		(42)
Net gain amortization	(11)		(11)		(31)		(32)
Curtailments	—		—		(1)		(1)
	$	(15)	$	(24)	$	(46)	$	(69)