Employee Benefits (Tables)

3 Months Ended

Mar. 31, 2016

Compensation And Retirement Disclosure [Abstract]

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

The components of the estimated net pension and other postretirement benefits plan income for the three months ended March 31, 2016 and 2015 were as follows:

	Three Months Ended
	March 31,
	2016			2015
Pension expense (income)
Service cost	$	0.3		$	0.6
Interest cost		36.9			44.8
Expected return on assets		(60.5	)		(61.6	)
Amortization, net		7.8			10.2
Net pension income	$	(15.5	)	$	(6.0	)
Other postretirement benefits plan expense (income)
Service cost	$	1.0		$	1.2
Interest cost		3.0			4.0
Expected return on plan assets		(3.4	)		(3.3	)
Amortization, net		(4.0	)		(6.7	)
Net other postretirement benefits plan income	$	(3.4	)	$	(4.8	)