Benefit Plans

6 Months Ended

Jun. 30, 2020

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Benefit Plans

Benefit Plans

The components of net periodic benefit cost for the three months ended June 30 were as follows:

	Pension benefits				Other retirement benefits				Total
($ in millions)	2020		2019		2020		2019		2020		2019
Service cost	$	0.3	$	0.3	$	—	$	—	$	0.3	$	0.3
Interest cost	1.9		2.5		—		—		1.9		2.5
Expected return on assets	(3.0)		(2.9)		—		—		(3.0)		(2.9)
Amortization of prior service credit	—		—		(0.1)		(0.1)		(0.1)		(0.1)
Recognized actuarial losses (gains)	0.5		0.6		(0.4)		(0.6)		0.1		—
Settlements	0.9		—		—		—		0.9		—
Net periodic benefit cost	$	0.6	$	0.5	$	(0.5)	$	(0.7)	$	0.1	$	(0.2)

	Pension benefits				Other retirement benefits				Total
($ in millions)	2020		2019		2020		2019		2020		2019
U.S. plans	$	0.2	$	—	$	(0.5)	$	(0.7)	$	(0.3)	$	(0.7)
International plans	0.4		0.5		—		—		0.4		0.5
Net periodic benefit cost	$	0.6	$	0.5	$	(0.5)	$	(0.7)	$	0.1	$	(0.2)

The components of net periodic benefit cost for the six months ended June 30 were as follows:

	Pension benefits				Other retirement benefits				Total
($ in millions)	2020		2019		2020		2019		2020		2019
Service cost	$	0.6	$	0.7	$	—	$	—	$	0.6	$	0.7
Interest cost	3.9		4.9		0.1		0.1		4.0		5.0
Expected return on assets	(6.0)		(5.8)		—		—		(6.0)		(5.8)
Amortization of prior service credit	—		—		(0.3)		(0.3)		(0.3)		(0.3)
Recognized actuarial losses (gains)	1.0		1.1		(0.8)		(1.1)		0.2		—
Settlements	2.3		—		—		—		2.3		—
Net periodic benefit cost	$	1.8	$	0.9	$	(1.0)	$	(1.3)	$	0.8	$	(0.4)

	Pension benefits				Other retirement benefits				Total
($ in millions)	2020		2019		2020		2019		2020		2019
U.S. plans	$	1.1	$	(0.1)	$	(1.0)	$	(1.3)	$	0.1	$	(1.4)
International plans	0.7		1.0		—		—		0.7		1.0
Net periodic benefit cost	$	1.8	$	0.9	$	(1.0)	$	(1.3)	$	0.8	$	(0.4)

During the three and six months ended June 30, 2020, we recorded a $0.9 million and $2.3 million pension settlement charge, respectively, within other nonoperating (income) expense, as we determined that normal-course lump-sum payments for our U.S. qualified defined benefit pension plan exceeded the threshold for settlement accounting under U.S. GAAP for the year.