Share Plans (Tables)

6 Months Ended

Jun. 30, 2025

Share-Based Payment Arrangement [Abstract]

Total share-based compensation expense for the three and six months ended June 30, 2025 and 2024 was as follows:


	Three months ended				Six months ended
In millions	June 30, 2025		June 30, 2024		June 30, 2025		June 30, 2024
Restricted stock units	$	3.9	$	4.3	$	7.2	$	8.1
Stock options	0.9		1.3		3.5		2.7
Performance share units	3.8		2.8		10.5		5.5
Total share-based compensation expense	$	8.6	$	8.4	$	21.2	$	16.3

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

We estimated the fair value of each stock option award issued in the annual share-based compensation grant using a Black-Scholes option pricing model, modified for dividends and using the following assumptions:


	2025 Annual Grant
Risk-free interest rate	4.12	%
Expected dividend yield	0.98	%
Expected share price volatility	31.10	%
Expected term (years)	6.9