PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Tables)

3 Months Ended

Mar. 31, 2018

Retirement Benefits [Abstract]

Net Periodic Benefit Cost for All Significant Plans

Net Periodic Benefit Cost for All Significant Plans	Three Months Ended
In millions	Mar 31, 2018			Mar 31, 2017
Defined Benefit Pension Plans:
Service cost	$	10		$	9
Interest cost	32			32
Expected return on plan assets	(55		)	(55		)
Amortization of net loss	24			21
Net periodic benefit cost	$	11		$	7
Other Postretirement Benefits:
Interest cost	$	2		$	2
Amortization of net gain	(2		)	(1		)
Net periodic benefit cost	$	—		$	1