BENEFIT PLANS: (Tables)

6 Months Ended

Jun. 30, 2026

Post retirement defined benefit plans

Components of net periodic benefit costs

Schedule of the components of net periodic benefit costs

The components of net periodic benefit costs for the six-month periods ended June 30, 2026 and 2025 are as follows (in millions):


		Six months ended
		June 30,
(in millions)		2026			2025
Service cost		$	1.6		$	1.2
Interest cost			2.0			1.9
Expected return on plan assets			(4.7)			(3.6)
Amortization of prior service cost / (credit)			0.1			0.1
Amortization of net loss/(gain)			(0.6)			0.1
Net periodic (benefit) cost		$	(1.6)		$	(0.3)

Post-retirement health care plans

Components of net periodic benefit costs

Schedule of the components of net periodic benefit costs

The components of net periodic benefit cost for the six-month periods ended June 30, 2026 and 2025 are as follows (in millions):


		Six months ended June 30,
(in millions)		2026			2025
Interest cost		$	1.2		$	1.0
Amortization of net loss (gain)			—			—
Net periodic cost		$	1.2		$	1.0