Benefit Plans (Tables)

9 Months Ended

Oct. 01, 2023

Benefit Plans [Abstract]

Net Periodic Benefit Cost

Components of Net Periodic Benefit Cost

	Pension Benefits
	Three Months Ended						Nine Months Ended
(in millions of dollars)	Oct. 1, 2023			Oct. 2, 2022			Oct. 1, 2023			Oct. 2, 2022
Service cost	$	1.2		$	1.6		$	3.5		$	5.2
Interest cost		4.0			3.1			11.9			7.8
Expected return on plan assets		(4.7	)		(5.1	)		(13.8	)		(16.5	)
Amortization:
Prior service cost		—			—			0.1			0.1
Recognized net actuarial loss		0.7			1.0			1.9			4.1
Settlement loss		—			0.2			—			1.7
Net periodic benefit cost	$	1.2		$	0.8		$	3.6		$	2.4

	Post-Retirement Benefits
	Three Months Ended						Nine Months Ended
(in millions of dollars)	Oct. 1, 2023			Oct. 2, 2022			Oct. 1, 2023			Oct. 2, 2022
Service cost	$	—		$	—		$	—		$	—
Interest cost		0.1			—			0.1			—
Amortization:
Recognized net actuarial (gain) loss		(0.1	)		(0.1	)		(0.3	)		(0.3	)
Net periodic benefit cost	$	—		$	(0.1	)	$	(0.2	)	$	(0.3	)