Pensions and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2023

Retirement Benefits [Abstract]

Net Periodic Benefit Cost

Net periodic pension benefit cost/(income) and other postretirement benefit cost for the three and nine months ended September 30, 2023 and 2022 were as follows:

	Pension
	Three Months Ended September 30		Nine Months Ended September 30
($ in millions)	2023	2022	2023	2022
Service cost	$2	$3	$6	$7
Interest cost	28	18	83	55
Expected return on plan assets	(28)	(35)	(83)	(106)
Amortization of actuarial losses	6	8	16	25
Settlements	—	—	191	—
Net periodic benefit cost/(income)	$8	($6)	$213	($19)

	Other Postretirement Benefits
	Three Months Ended September 30		Nine Months Ended September 30
($ in millions)	2023	2022	2023	2022
Service cost	$1	$2	$3	$6
Interest cost	7	4	20	12
Amortization of actuarial losses/(gains)	—	3	(1)	9
Amortization of prior service credit	(2)	(3)	(5)	(8)
Net periodic benefit cost	$6	$6	$17	$19

Defined Contribution Plan Disclosures

	Three Months Ended September 30		Nine Months Ended September 30
($ in millions)	2023	2022	2023	2022
Non-U.S. defined benefit pension mandatory contributions	$1	$—	$3	$2