Pensions and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2020

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Net Periodic Benefit Cost

The net periodic pension and other postretirement benefit costs for the three and nine months ended September 30, 2020 and 2019 were as follows:

	Pension
	Three Months Ended September 30		Nine Months Ended September 30
($ in millions)	2020	2019	2020	2019
Service cost	$6	$6	$18	$17
Interest cost	22	26	65	79
Expected return on plan assets	(36)	(35)	(108)	(105)
Amortization of actuarial losses	17	16	53	47
Curtailments	—	—	1	—
Net periodic benefit cost	$9	$13	$29	$38

Defined Contribution Plan Disclosures

	Three Months Ended September 30		Nine Months Ended September 30
($ in millions)	2020	2019	2020	2019
Non-U.S. defined benefit pension mandatory contributions	$2	$2	$7	$8