Employee Benefit Plans

3 Months Ended

Mar. 31, 2017

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Employee Benefit Plans

Employee Benefit Plans

Defined Benefit Pension and Other Postretirement Benefit (OPEB) Plans

We sponsor several defined benefit pension and OPEB plans for our employees, including non-qualified pension plans. The U.S. qualified and non-qualified defined benefit pension plans comprise the majority of our total benefit obligation and benefit cost. We maintain a separate defined benefit plan for eligible employees in our U.K. operation. The U.S. defined benefit pension plans were closed to new entrants on December 31, 2013, the OPEB plan was closed to new entrants on December 31, 2012, and the U.K. plan was closed to new entrants on December 31, 2002.

The following table provides the components of the net periodic benefit cost (credit) for the defined benefit pension and OPEB plans.

	Three Months Ended March 31
	Pension Benefits
	U.S. Plans						U.K. Plan						OPEB
	2017			2016			2017			2016			2017			2016
	(in millions of dollars)
Service Cost	$	2.0		$	1.7		$	—		$	—		$	—		$	—
Interest Cost	21.1			21.3			1.5			1.9			1.5			1.8
Expected Return on Plan Assets	(25.8		)	(25.7		)	(2.0		)	(2.7		)	(0.2		)	(0.2		)
Amortization of:
Net Actuarial Loss	4.9			4.1			0.2			—			—			—
Prior Service Credit	(0.1		)	(0.1		)	—			—			(0.1		)	—
Total	$	2.1		$	1.3		$	(0.3	)	$	(0.8	)	$	1.2		$	1.6