Benefit Plans (Tables)

6 Months Ended

Jul. 01, 2018

Benefit Plans [Abstract]

Net Periodic Benefit Cost

Components of Net Periodic Benefit Cost

	Pension Benefits
	Three Months Ended						Six Months Ended
	July 1, 2018			July 2, 2017			July 1, 2018			July 2, 2017
	(millions of dollars)
Service cost	$	2.0		$	2.1		$	3.9		$	4.1
Interest cost		3.0			3.1			6.1			6.2
Expected return on plan assets		(4.8	)		(4.6	)		(9.6	)		(9.1	)
Amortization:
Prior service cost		0.1			0.6			0.2			1.2
Recognized net actuarial loss		2.7			2.1			5.5			4.2
Net periodic benefit cost	$	3.0		$	3.3		$	6.1		$	6.6

	Other Benefits
	Three Months Ended						Six Months Ended
	July 1, 2018			July 2, 2017			July 1, 2018			July 2, 2017
	(millions of dollars)
Service cost	$	0.1		$	0.1		$	0.1		$	0.2
Interest cost		-			0.1			0.1			0.1
Amortization:
Prior service cost		(0.2	)		(0.8	)		(0.4	)		(1.5	)
Recognized net actuarial (gain) loss		(0.2	)		(0.1	)		(0.4	)		(0.2	)
Net periodic benefit cost	$	(0.3	)	$	(0.7	)	$	(0.6	)	$	(1.4	)