Retirement Plans (Tables)

3 Months Ended

Mar. 31, 2016

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Pension Cost

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