Employee Benefits (Tables)

3 Months Ended

Mar. 31, 2015

Compensation And Retirement Disclosure [Abstract]

Components of Estimated Net Pension and Other Postretirement Benefit Plan (Income) Expense

The components of the estimated net pension and other postretirement benefits plan income for the three months ended March 31, 2015 and 2014 were as follows:

	Three Months Ended
	March 31,
	2015			2014
Pension (income) expense
Service cost	$	0.6		$	0.5
Interest cost		44.8			47.7
Expected return on assets		(61.6	)		(63.1	)
Amortization, net		10.2			7.8
Net pension income	$	(6.0	)	$	(7.1	)
Other postretirement benefits plan (income) expense
Service cost	$	1.2		$	1.1
Interest cost		4.0			4.2
Expected return on plan assets		(3.3	)		(3.1	)
Amortization, net		(6.7	)		(6.4	)
Net other postretirement benefits plan income	$	(4.8	)	$	(4.2	)