Retirement Plans

3 Months Ended

Mar. 31, 2016

Compensation And Retirement Disclosure [Abstract]

Retirement Plans

6.  Retirement Plans

Components of net periodic pension cost consisted of the following:

	Three Months Ended
	March 31,
	2016			2015
	(In millions)
Service cost	$	16		$	17
Interest cost		28			26
Expected return on plan assets		(42	)		(42	)
Amortization of unrecognized net actuarial losses		16			19
Pension expense	$	18		$	20

In 2016, we expect to contribute $27 million to our funded pension plans.  Through March 31, 2016, we contributed $6 million of this amount.