Employee Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2017

Defined Benefit Plan [Abstract]

Schedule of Net Periodic Benefit Costs

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

	Three Months Ended September 30
	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			1.6			1.7			1.4			1.8
Expected Return on Plan Assets	(25.8		)	(25.7		)	(2.1		)	(2.5		)	(0.1		)	(0.2		)
Amortization of:
Net Actuarial Loss	4.9			4.0			0.2			0.1			—			—
Prior Service Credit	(0.1		)	—			—			—			(0.1		)	—
Total	$	2.1		$	1.3		$	(0.3	)	$	(0.7	)	$	1.2		$	1.6

	Nine Months Ended September 30
	Pension Benefits
	U.S. Plans						U.K. Plan						OPEB
	2017			2016			2017			2016			2017			2016
	(in millions of dollars)
Service Cost	$	5.9		$	5.2		$	—		$	—		$	—		$	—
Interest Cost	63.3			63.9			4.6			5.4			4.4			5.4
Expected Return on Plan Assets	(77.3		)	(77.1		)	(5.9		)	(7.9		)	(0.4		)	(0.5		)
Amortization of:
Net Actuarial Loss	14.7			12.1			0.5			0.1			—			—
Prior Service Credit	(0.2		)	(0.1		)	—			—			(0.3		)	(0.1		)
Plan Amendment	—			—			—			—			—			0.9
Total	$	6.4		$	4.0		$	(0.8	)	$	(2.4	)	$	3.7		$	5.7