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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement, Disclosure [Abstract] |
Share-based Payment Arrangement, Cost by Plan [Table Text Block] | The following table summarizes the expenses recognized:
In millions |  | 2024 |  | 2023 |  | 2022
Stock options |  | $ | 17.9 |  |  | $ | 16.1 |  |  | $ | 14.1 |
RSUs |  | 27.3 |  |  | 23.5 |  |  | 19.7 |
PSUs |  | 36.4 |  |  | 23.2 |  |  | 20.7 |
Deferred compensation |  | 3.9 |  |  | 4.3 |  |  | 1.2 |
Pre-tax expense |  | 85.5 |  |  | 67.1 |  |  | 55.7 |
Tax benefit |  | (20.7) |  |  | (16.3) |  |  | (13.5) |
After-tax expense |  | $ | 64.8 |  |  | $ | 50.8 |  |  | $ | 42.2 |
Amounts recorded in continuing operations |  | $ | 64.8 |  |  | $ | 50.8 |  |  | $ | 42.6 |
Amounts recorded in discontinued operations |  | — |  |  | — |  |  | (0.4) |
Total |  | $ | 64.8 |  |  | $ | 50.8 |  |  | $ | 42.2 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] | The following assumptions were used during the year ended December 31:
|  | 2024 |  | 2023 |  | 2022
Dividend yield |  | 1.11 | % |  | 1.50 | % |  | 1.60 | %
Volatility |  | 29.99 | % |  | 29.37 | % |  | 28.23 | %
Risk-free rate of return |  | 4.00 | % |  | 3.62 | % |  | 1.56 | %
Expected life in years |  | 4.8 |  | 4.8 |  | 4.8
Share-based Payment Arrangement, Option, Activity [Table Text Block] | Changes in options outstanding under the plans for the years 2024, 2023 and 2022 were as follows:
|  | Shares subject to option |  | Weighted- average exercise price |  | Aggregate intrinsic value (millions) |  | Weighted- average remaining life (years)
December 31, 2021 |  | 4,411,000 |  |  | $ | 83.39 |  |  |  |  |
Granted |  | 430,496 |  |  | 167.93 |  |  |  |  |
Exercised |  | (633,962) |  |  | 66.06 |  |  |  |  |
Cancelled |  | (57,050) |  |  | 137.38 |  |  |  |  |
December 31, 2022 |  | 4,150,484 |  |  | $ | 94.06 |  |  |  |  |
Granted |  | 425,444 |  |  | 182.27 |  |  |  |  |
Exercised |  | (1,382,846) |  |  | 80.67 |  |  |  |  |
Cancelled |  | (21,365) |  |  | 168.18 |  |  |  |  |
December 31, 2023 |  | 3,171,717 |  |  | $ | 111.23 |  |  |  |  |
Granted |  | 268,922 |  |  | 278.57 |  |  |  |  |
Exercised |  | (914,667) |  |  | 86.25 |  |  |  |  |
Cancelled |  | (17,842) |  |  | 227.59 |  |  |  |  |
Outstanding December 31, 2024 |  | 2,508,130 |  |  | $ | 137.46 |  |  | $ | 581.8 |  |  | 5.4
Exercisable December 31, 2024 |  | 1,815,960 |  |  | $ | 107.50 |  |  | $ | 475.5 |  |  | 4.4
Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block] | The following table summarizes RSU activity for the years 2024, 2023 and 2022:
|  | RSUs |  | Weighted- average grant date fair value
Outstanding and unvested at December 31, 2021 |  | 371,030 |  |  | $ | 118.88 |
Granted |  | 139,730 |  |  | 165.07 |
Vested |  | (202,172) |  |  | 107.29 |
Cancelled |  | (13,935) |  |  | 136.89 |
Outstanding and unvested at December 31, 2022 |  | 294,653 |  |  | $ | 147.88 |
Granted |  | 214,425 |  |  | 184.35 |
Vested |  | (154,134) |  |  | 134.87 |
Cancelled |  | (13,153) |  |  | 173.28 |
Outstanding and unvested at December 31, 2023 |  | 341,791 |  |  | $ | 175.65 |
Granted |  | 112,227 |  |  | 287.84 |
Vested |  | (134,791) |  |  | 164.69 |
Cancelled |  | (10,448) |  |  | 214.39 |
Outstanding and unvested at December 31, 2024 |  | 308,779 |  |  | $ | 219.89 |
Schedule of Share-based Compensation, Performance Shares [Table Text Block] | The following table summarizes PSU activity for the maximum number of shares that may be issued for the years 2024, 2023 and 2022:
|  | PSUs |  | Weighted-average grant date fair value
Outstanding and unvested at December 31, 2021 |  | 801,956 |  |  | $ | 131.14 |
Granted |  | 195,930 |  |  | 170.31 |
Vested |  | (346,540) |  |  | 89.70 |
Forfeited |  | (42,320) |  |  | 164.21 |
Outstanding and unvested at December 31, 2022 |  | 609,026 |  |  | $ | 165.02 |
Granted |  | 208,046 |  |  | 207.23 |
Vested |  | (237,586) |  |  | 147.33 |
Forfeited |  | (20,526) |  |  | 186.32 |
Outstanding and unvested at December 31, 2023 |  | 558,960 |  |  | $ | 187.47 |
Granted |  | 161,978 |  |  | 332.85 |
Vested |  | (184,060) |  |  | 182.48 |
Forfeited |  | (21,072) |  |  | 226.31 |
Outstanding and unvested at December 31, 2024 |  | 515,806 |  |  | $ | 233.32 |
Share Based Compensation Stock Option And Restricted Stock Units Granted [Text Block] | Grants issued during the years ended December 31 were as follows:
| 2024 |  | 2023 |  | 2022
| Number Granted |  | Weighted-average fair value per award |  | Number Granted |  | Weighted-average fair value per award |  | Number Granted |  | Weighted-average fair value per award
Stock options | 268,922 |  |  | $ | 79.09 |  |  | 425,444 |  |  | $ | 47.53 |  |  | 430,496 |  |  | $ | 35.96 |
RSUs | 112,227 |  |  | $ | 287.84 |  |  | 214,425 |  |  | $ | 184.35 |  |  | 139,730 |  |  | $ | 165.07 |
Performance shares (1) | 161,978 |  |  | $ | 332.85 |  |  | 208,046 |  |  | $ | 207.23 |  |  | 195,930 |  |  | $ | 170.31 |
(1) The number of performance shares represents the maximum award level.

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