Stock-Based Compensation Plans (Tables)

6 Months Ended

12 Months Ended

Jun. 30, 2024

Dec. 31, 2023

Stock-Based Compensation Plans

Schedule of stock-based awards granted under the Stock-Based Compensation Plans

	For the six months ended June 30,
	2024		2023
	(in millions)
Compensation cost	$	14.4	$	12.8
Related income tax benefit		2.9		2.5
Capitalized as part of an asset		0.7		0.8

	For the year ended December 31,
	2023		2022		2021
	(in millions)
Compensation cost	$	25.3	$	22.2	$	25.2
Related income tax benefit		5.1		4.6		4.3
Capitalized as part of an asset		1.1		1.2		1.4