Defined Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2023

Retirement Benefits [Abstract]

Schedule of Defined Benefit Plans

The table below provides summary information on our defined benefit plans:

	December 31,
	2023		2022		2021
	in millions
Fair value of plan assets (a)	$	1,202.6	$	1,066.1	$	1,269.9
Projected benefit obligation	$	1,214.2	$	1,016.0	$	1,280.5
Net asset (liability)	$	(11.6)	$	50.1	$	(10.6)

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(a)The fair value of plan assets at December 31, 2023 includes $969.5 million and $233.1 million of assets that are valued based on Level 1 and Level 2 inputs, respectively, of the fair value hierarchy (as further described in note 9). Our plan assets comprise investments in debt securities, equity securities, hedge funds, insurance contracts and certain other assets.