Share Plans (Tables)

3 Months Ended

Mar. 31, 2024

Share-Based Payment Arrangement [Abstract]

Share-based Compensation Expense

Total share-based compensation expense for the three months ended March 31, 2024 and 2023 was as follows:

	Three months ended
In millions	March 31, 2024		March 31, 2023
Restricted stock units	$	3.8	$	3.7
Stock options	1.4		1.1
Performance share units	2.7		2.4
Total share-based compensation expense	$	7.9	$	7.2

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:

	2024 Annual Grant
Risk-free interest rate	4.44	%
Expected dividend yield	1.43	%
Expected share price volatility	30.90	%
Expected term (years)	6.5