Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2024

Benefit Plans [Abstract]

Net Periodic Benefit Cost

Components of Net Periodic Benefit Cost

	Pension Benefits
	Three Months Ended						Six Months Ended
(in millions of dollars)	Jun. 30, 2024			Jul. 2, 2023			Jun. 30, 2024			Jul. 2, 2023
Service cost	$	1.1		$	1.2		$	2.3		$	2.3
Interest cost		4.0			3.9			8.0			7.9
Expected return on plan assets		(4.9	)		(4.6	)		(9.9	)		(9.1	)
Amortization:
Prior service cost		—			0.1			—			0.1
Recognized net actuarial loss		0.4			0.6			0.8			1.2
Net periodic benefit cost	$	0.6		$	1.2		$	1.2		$	2.4

	Post-Retirement Benefits
	Three Months Ended						Six Months Ended
(in millions of dollars)	Jun. 30, 2024			Jul. 2, 2023			Jun. 30, 2024			Jul. 2, 2023
Service cost	$	—		$	—		$	—		$	—
Interest cost		—			—			—			—
Amortization:
Recognized net actuarial (gain) loss		(0.1	)		(0.1	)		(0.2	)		(0.2	)
Net periodic benefit cost	$	(0.1	)	$	(0.1	)	$	(0.2	)	$	(0.2	)