Defined Benefit and Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2021

Retirement Benefits [Abstract]

Schedule of Defined Benefit Plans Disclosures

For all plans, the components of net periodic benefit for the three months ended September 30, 2021 and 2020 are as follows:

	Pension				Postretirement
(in millions)	2021		2020		2021		2020
Service cost	$	1.6	$	1.6	$	0.1	$	0.1
Interest cost	5.2		6.6		0.2		0.2
Expected return on plan assets	(14.8)		(14.7)		—		—
Amortization of prior service cost	(0.1)		(0.1)		(0.3)		(0.3)
Amortization of net loss	6.5		4.8		—		—
Net periodic benefit	$	(1.6)	$	(1.8)	$	—	$	—

For all plans, the components of net periodic benefit for the nine months ended September 30, 2021 and 2020 are as follows:

	Pension				Postretirement
(in millions)	2021		2020		2021		2020
Service cost	$	4.7	$	4.8	$	0.3	$	0.2
Interest cost	15.7		19.9		0.5		0.6
Expected return on plan assets	(44.7)		(43.5)		—		—
Recognized curtailment gain	(0.6)		—		—		—
Amortization of prior service cost	(0.2)		(0.2)		(0.8)		(0.8)
Amortization of net loss	19.6		14.5		—		—
Net periodic benefit	$	(5.5)	$	(4.5)	$	—	$	—

Schedule of Contributions By Benefit Plan Type

We expect to contribute the following to our pension and postretirement plans:

(in millions)	Pension		Postretirement
Expected contributions in 2021	$	20.7	$	2.6
Amounts contributed during the nine months ended September 30, 2021	$	20.4	$	2.4