Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2020

Retirement Benefits [Abstract]

Pension and Other Postretirement Benefit Costs

Pension and other postretirement benefit costs for the three months ended March 31, 2020 and 2019 were as follows:

	Three Months Ended
	March 31,
	Pension						Other Postretirement Benefits
In millions	2020			2019			2020			2019
Components of net periodic benefit cost:
Service cost	$	14		$	13		$	2		$	2
Interest cost	15			20			4			5
Expected return on plan assets	(28		)	(30		)	(6		)	(6		)
Amortization of actuarial loss (gain)	12			5			—			—
Total net periodic benefit cost	$	13		$	8		$	—		$	1