Pension Benefit Plans (Tables)

9 Months Ended

Sep. 30, 2021

Retirement Benefits [Abstract]

Components of net periodic benefit cost

The components of net periodic benefit cost for pension benefits were as follows (in millions):

	For the Three Months Ended September 30,				For the Nine Months Ended September 30,
	2021		2020		2021		2020
Service cost	$	1.5	$	1.4	$	4.6	$	4.2
Interest cost	1.0		1.6		4.1		5.0
Expected return on plan assets	(1.7)		(2.0)		(7.1)		(6.2)
Amortization of prior service cost	0.1		—		0.1		0.1
Recognized actuarial loss	1.8		1.4		6.0		4.3
Other	—		0.1		(0.4)		—
Settlements and curtailments	0.3		0.3		1.1		0.3
Net periodic benefit cost	$	3.0	$	2.8	$	8.4	$	7.7