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Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Share-Based Compensation

The following table presents share-based compensation expense:

	For the Three Months Ended March 31,
	2024		2025
Share-based compensation expense	$21.1		$10.8
Tax benefit	2.3		1.1

Schedule of Company Restricted Stock Units Transactions

The following table summarizes transactions in the Company’s restricted stock units:

	Restricted Stock Units		Weighted Average Grant Date Value Per Unit
Unvested units—December 31, 2024	0.8		$147.46
Units granted	0.3		166.02
Units vested	(0.4)		136.46
Units forfeited	(0.0)		157.49
Performance condition changes	—		—
Unvested units—March 31, 2025	0.7		$159.75

Schedule of Company Stock Option Transactions

The following table summarizes transactions in the Company’s stock options:

	Stock Options		Weighted Average Exercise Price Per Option		Weighted Average Remaining Contractual Life (Years)
Unexercised options outstanding—December 31, 2024	1.7		$78.45
Options granted	—		—
Options exercised	(0.1)		73.81
Options forfeited	—		—
Options expired	(0.0)		203.22
Performance condition changes	—		—
Unexercised options outstanding—March 31, 2025	1.6		$78.30		1.6
Exercisable at March 31, 2025	1.5		$75.48		1.5

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Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit.

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)
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Tabular disclosure of the changes in outstanding nonvested shares.

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-Name Accounting Standards Codification
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Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value.

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