Pensions and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 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 months ended March 31, 2020 and 2019 were as follows:

	Pension		Other Postretirement Benefits
	Three Months Ended March 31		Three Months Ended March 31
($ in millions)	2020	2019	2020	2019
Service cost	$6	$6	$2	$2
Interest cost	22	26	5	6
Expected return on plan assets	(36)	(35)	—	—
Amortization of actuarial losses	18	15	4	2
Amortization of prior service credit	—	—	(15)	(14)
Net periodic benefit cost	$10	$12	($4)	($4)

Defined Contribution Plan Disclosures

	Three Months Ended March 31
($ in millions)	2020	2019
Non-U.S. defined benefit pension mandatory contributions	$2	$3