Pension and Postretirement Benefits

9 Months Ended

Sep. 30, 2022

Retirement Benefits [Abstract]

Pension and Postretirement Benefits

7.Pension and Postretirement Benefits

The net periodic benefit cost (credit) for pension and postretirement benefits includes the following components:

	Pension						Postretirement Benefits
	Three Months Ended March 31,
	2023			2022			2023			2022
	(Dollars in Millions)
Service cost	$	7.7		$	11.5		$	—		$	—
Interest cost		12.7			10.2			0.1			0.1
Expected return on assets		(17.8	)		(19.4	)		—			—
Amortization of:
Prior service cost (credit)		1.4			1.2			(0.1	)		(0.2	)
Actuarial loss (gain)		0.1			0.9			(0.1	)		(0.1	)
Net periodic benefit cost (credit)	$	4.1		$	4.4		$	(0.1	)	$	(0.2	)

The components of net periodic benefit cost (credit), other than service cost, are included in the line item Other nonoperating income, net, in the consolidated statements of earnings and comprehensive earnings. Based on the roles of the employees, service cost is included in Cost of revenues or Selling, general and administrative expenses line items in the consolidated statements of earnings and comprehensive earnings.