Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 2016

Compensation and Retirement Disclosure [Abstract]

Pension and Other Postretirement Benefit Costs

Pension and other postretirement benefit costs for the three months ended March 31, 2016 and 2015, were as follows:

	Three Months Ended
	March 31,
	Pension						Other Postretirement Benefits
In millions	2016			2015			2016			2015
Components of net periodic benefit cost:
Service cost	$	16		$	18		$	2		$	3
Interest cost	23			23			6			6
Expected return on plan assets	(37		)	(38		)	(6		)	(6		)
Amortization of actuarial (gain) loss	11			15			—			—
Net periodic benefit (income) cost	$	13		$	18		$	2		$	3