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Share-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2025
Share-Based Payment Arrangement [Abstract] |
Schedule of Share-Based Compensation Expense | Total share-based compensation expense for the three and nine months ended September 30, 2025 and 2024, was as follows:
| Three months ended |  | Nine months ended
In millions | September 30, 2025 | September 30, 2024 |  | September 30, 2025 | September 30, 2024
Restricted stock units | $ | 5.1 |  | $ | 3.8 |  |  | $ | 14.4 |  | $ | 10.3 |
Performance share units | 3.5 |  | 2.2 |  |  | 10.3 |  | 5.8 |
Stock options | 2.1 |  | 1.4 |  |  | 6.1 |  | 4.0 |
Total | $ | 10.7 |  | $ | 7.4 |  |  | $ | 30.8 |  | $ | 20.1 |
Schedule of 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 | 4.33 | %
Expected dividend yield | 1.16 | %
Expected share price volatility | 37.6 | %
Expected term (years) | 6.1

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- Definition Tabular disclosure of share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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