Employee Benefits

3 Months Ended

Mar. 31, 2013

Employee Benefits

7. Employee Benefits

The components of the estimated net pension and other postretirement benefits plan income for the three months ended March31, 2013 and 2012 were as follows:

	Three Months Ended
	March 31,
	2013		2012
Pension (income) expense
Service cost	$	0.8	$	1.9
Interest cost		44.6		47.4
Expected return on plan assets		(60.6)		(65.8)
Amortization, net		12.6		7.1
Net pension income	$	(2.6)	$	(9.4)
Other postretirement benefits plan (income) expense
Service cost	$	1.8	$	1.7
Interest cost		4.1		4.6
Expected return on plan assets		(3.0)		(3.5)
Amortization, net		(4.9)		(5.0)
Net other postretirement benefits plan income	$	(2.0)	$	(2.2)