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Share-based compensation plans (Tables)

9 Months Ended

Sep. 30, 2025

Share-Based Payment Arrangement [Abstract]

Compensation expense by plan

Compensation expenses are classified as selling, general and administrative expenses in the condensed consolidated statements of operations. Compensation expenses for the share-based awards were as follows:

			Compensation Expense												Compensation Expense
			Three Months Ended September 30,												Nine Months Ended September 30,
(In millions)			2025						2024						2025						2024
Performance stock units			$	2.0					4.7						$	9.7					15.5
Restricted stock units			2.4						2.5						7.8						7.6
Deferred stock units and fees paid in stock			0.5						0.3						1.2						1.0
Cash based awards			1.0						0.9						1.8						2.3
Share-based payment expense			5.9						8.4						20.5						26.4
Income tax benefit			(1.4)						(1.9)						(4.7)						(6.0)
Share-based payment expense, net of tax			$	4.5					6.5						$	15.8					20.4

Option activity

The following table summarizes time-based stock option activity during the first nine months of 2025: 

			Shares (in thousands)						Weighted-Average Grant-Date Fair Value
Outstanding balance as of December 31, 2024			22.5						$	20.98
Exercised			(19.7)						21.15
Outstanding balance as of September 30, 2025			2.8						$	19.75

Nonvested share activity

The following table summarizes RSU activity during the first nine months of 2025: 

			Shares (in thousands)						Weighted-Average Grant-Date Fair Value
Nonvested balance as of December 31, 2024			290.4						$	74.24
Granted			158.7						88.59
Forfeited			(37.3)						82.84
Vested			(147.1)						69.63
Nonvested balance as of September 30, 2025			264.7						$	84.19

The following table summarizes all PSU activity during the first nine months of 2025:

			Shares (in thousands)						Weighted-Average Grant-Date Fair Value
Nonvested balance as of December 31, 2024			639.1						$	72.64
Granted			221.8						89.86
Forfeited or expired			(101.1)						81.31
Vested(a)			(235.0)						67.17
Nonvested balance as of September 30, 2025			524.8						$	80.70

(a)The vested PSUs presented are based on the target amount of the award. In accordance with the terms of the underlying award agreements, the actual shares earned and distributed for the performance period ended December 31, 2024 were 440.2 thousand, compared to target shares of 235.0 thousand.

The following table summarizes all DSU activity during the first nine months of 2025:

			Shares (in thousands)						Weighted-Average Grant-Date Fair Value
Nonvested balance as of December 31, 2024			13.6						$	87.93
Granted			14.8						92.19
Vested			(13.6)						87.93
Nonvested balance as of September 30, 2025			14.8						$	92.19

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Tabular disclosure of share-based payment arrangement.

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-Topic 718
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-Section 50
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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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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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