Benefit Plans (Tables)

3 Months Ended

Mar. 30, 2025

Benefit Plans [Abstract]

Net Periodic Benefit Cost

Components of Net Periodic Benefit Cost

	Pension Benefits
	Three Months Ended
(in millions of dollars)	Mar. 30, 2025			Mar. 31, 2024
Service cost	$	1.0		$	1.2
Interest cost		4.2			4.0
Expected return on plan assets		(5.5	)		(5.0	)
Amortization:
Recognized net actuarial loss		0.2			0.4
Net periodic benefit cost	$	(0.1	)	$	0.6

	Post-Retirement Benefits
	Three Months Ended
(in millions of dollars)	Mar. 30, 2025				Mar. 31, 2024
Service cost		$	—			$	—
Interest cost			—				—
Amortization:
Recognized net actuarial (gain)			(0.1	)			(0.1	)
Net periodic benefit cost		$	(0.1	)		$	(0.1	)