Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2015

Defined Benefit Pension Plans

Components of Net Periodic Defined Benefit Cost

Defined benefit plans – The components of our net periodic defined benefit pension cost are presented in the table below.

	Three months ended March 31,
	2014			2015
	(In millions)
Service cost	$	2.6		$	2.9
Interest cost		6.3			4.6
Expected return on plan assets		(6.2	)		(5.4	)
Amortization of unrecognized prior service cost		.2			.2
Recognized actuarial losses		2.8			3.8
Total	$	5.7		$	6.1

OPEB

Components of Net Periodic Defined Benefit Cost

Other postretirement benefits – The components of our net periodic other postretirement benefit cost are presented in the table below.

	Three months ended March 31,
	2014			2015
	(In millions)
Interest cost	$	.2		$	.2
Amortization of prior service credit		(.5	)		(.5	)
Total	$	(.3	)	$	(.3	)