Benefit Plans (Tables)

6 Months Ended

Jun. 29, 2025

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. 29, 2025			Jun. 30, 2024			Jun. 29, 2025			Jun. 30, 2024
Service cost	$	1.0		$	1.1		$	2.0		$	2.3
Interest cost		4.2			4.0			8.4			8.0
Expected return on plan assets		(5.5	)		(4.9	)		(11.0	)		(9.9	)
Amortization:
Recognized net actuarial loss		0.2			0.4			0.4			0.8
Net periodic benefit cost	$	(0.1	)	$	0.6		$	(0.2	)	$	1.2

	Post-Retirement Benefits
	Three Months Ended								Six Months Ended
(in millions of dollars)	Jun. 29, 2025				Jun. 30, 2024				Jun. 29, 2025				Jun. 30, 2024
Service cost		$	—			$	—			$	—			$	—
Interest cost			—				—				—				—
Amortization:
Recognized net actuarial gain			(0.1	)			(0.1	)			(0.2	)			(0.2	)
Net periodic benefit cost		$	(0.1	)		$	(0.1	)		$	(0.2	)		$	(0.2	)