Employee benefit plans

3 Months Ended

Mar. 31, 2013

Compensation And Retirement Disclosure [Abstract]

Employee benefit plans

Note 11—Employee benefit plans:

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

	Three months ended March  31,
	2012			2013
	(In millions)
Service cost	$	2.6		$	3.3
Interest cost		6.4			6.1
Expected return on plan assets		(5.5	)		(6.1	)
Amortization of unrecognized:
Prior service cost		.4			.4
Net transition obligations		.1			.1
Actuarial losses		2.3			3.4
Total	$	6.3		$	7.2

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

	Three months ended March 31,
	2012			2013
	(In millions)
Service cost	$	.1		$	.1
Interest cost		.2			.2
Amortization of prior service credit		(.5	)		(.5	)
Total	$	(.2	)	$	(.2	)

Contributions – We expect to contribute the equivalent of $28.5 million and $1.6 million, respectively, to all of our defined benefit pension plans and other postretirement benefit plans during 2013.