RETIREMENT AND OTHER BENEFIT PROGRAMS (Tables)

3 Months Ended

Mar. 31, 2018

Compensation And Retirement Disclosure [Abstract]

Net Periodic Benefit Cost Relating to Pension and Other Postemployment Benefit Plans

The following is a summary of net periodic benefit cost relating to the company’s pension and other postemployment benefit (OPEB) plans.

	Three months ended
	March 31,
(in millions)	2018			2017
Pension benefits
Service cost	$	22		$	22
Interest cost		46			45
Expected return on plan assets		(78	)		(72	)
Amortization of net losses and other deferred amounts		24			40
Net periodic pension benefit cost	$	14		$	35
OPEB
Service cost	$	—		$	—
Interest cost		2			2
Amortization of net loss and prior service credit		(6	)		(6	)
Net periodic OPEB cost	$	(4	)	$	(4	)