Pension and Other Postretirement Benefit Plans (Tables)

6 Months Ended

Jun. 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 June 30,								Six Months Ended June 30,
	2023				2022				2023				2022
($ in millions)	U.S.		International		U.S.		International		U.S.		International		U.S.		International
Service cost	$	76	$	50	$	99	$	72	$	152	$	99	$	198	$	147
Interest cost	133		75		103		37		266		149		206		75
Expected return on plan assets	(185)		(130)		(197)		(98)		(372)		(257)		(393)		(199)
Amortization of unrecognized prior service cost (credit)	—		16		(8)		(3)		(1)		12		(16)		(7)
Net (gain) loss amortization	—		(1)		56		25		—		(2)		112		50
Termination benefits	1		—		1		—		1		—		1		—
Curtailments	2		—		4		—		5		—		8		—
Settlements	5		—		101		—		26		—		101		—
	$	32	$	10	$	159	$	33	$	77	$	1	$	217	$	66

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 June 30,				Six Months Ended June 30,
($ in millions)	2023		2022		2023		2022
Service cost	$	8	$	12	$	17	$	25
Interest cost	16		11		31		23
Expected return on plan assets	(16)		(21)		(32)		(43)
Amortization of unrecognized prior service credit	(12)		(14)		(25)		(29)
Net gain amortization	(11)		(11)		(21)		(21)
	$	(15)	$	(23)	$	(30)	$	(45)