Employee Benefits (Tables)

9 Months Ended

Sep. 30, 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 expense (income) for the three and nine months ended September 30, 2016 and 2015 were as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Pension expense (income)
Service cost	$	0.3		$	0.5		$	0.9		$	1.6
Interest cost		36.8			44.5			110.5			133.9
Expected return on plan assets		(58.6	)		(61.4	)		(180.0	)		(184.7	)
Amortization, net		7.8			10.1			23.5			30.5
Settlements		1.6			—			98.5			—
Net pension (income) expense	$	(12.1	)	$	(6.3	)	$	53.4		$	(18.7	)
Other postretirement benefits plan expense (income)
Service cost	$	1.0		$	1.1		$	3.0		$	3.5
Interest cost		3.1			4.0			9.2			12.0
Expected return on plan assets		(3.4	)		(3.3	)		(10.2	)		(9.8	)
Amortization, net		(4.0	)		(6.7	)		(12.0	)		(20.2	)
Curtailments		(19.7	)		—			(19.7	)		—
Net other postretirement benefits plan income	$	(23.0	)	$	(4.9	)	$	(29.7	)	$	(14.5	)