PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2016

Components of Net Periodic Benefit Costs (Credits)

The components of net periodic benefit costs (credits) are:

	PENSION
	QUARTER ENDED
DOLLAR AMOUNTS IN MILLIONS	MARCH 2016			MARCH 2015
Service cost	$	13		$	15
Interest cost	68			65
Expected return on plan assets	(123		)	(118		)
Amortization of actuarial loss	38			44
Amortization of prior service cost	1			1
Accelerated pension costs included in Plum Creek merger-related costs (Note 15)	5			—
Total net periodic benefit cost (credit)	$	2		$	7

	OTHER POSTRETIREMENT BENEFITS
	QUARTER ENDED
DOLLAR AMOUNTS IN MILLIONS	MARCH 2016			MARCH 2015
Interest cost	$	2		$	3
Amortization of actuarial loss	2			2
Amortization of prior service credit	(2		)	(2		)
Total net periodic benefit cost	$	2		$	3