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Equity (Tables) | 12 Months Ended
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Dec. 31, 2024
Equity |
Schedule of stock option activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ |
​ |  | ​ | ​ | ​ | ​ | Average | ​ | Aggregate |
​ |  | ​ | ​ | Weighted | ​ | Remaining | ​ | Intrinsic |
​ |  | ​ | ​ | Average | ​ | Contractual | ​ | Value | ​
​ |  | Options |  | Exercise Price |  | Term (in years) |  | (in millions) |
Options outstanding at January 1, 2022 |  | 130,601,496 | ​ | $ | 21.00 |  | 6.47 | ​ | ​ | ​ | ​
Options granted |  | 14,181,596 | ​ |  | 34.47 | ​ | ​ | ​ | ​ | ​ | ​
Options exercised |  | (11,254,778) | ​ |  | 16.44 | ​ | ​ | ​ | ​ | ​ | ​
Options forfeited |  | (1,258,240) | ​ |  | 25.91 | ​ | ​ | ​ | ​ | ​ | ​
Options outstanding at December 31, 2022 |  | 132,270,074 | ​ |  | 22.78 | ​ | 6.03 | ​ | ​ | ​ | ​
Options granted |  | 12,131,028 | ​ |  | 37.99 | ​ | ​ | ​ | ​ | ​ | ​
Options exercised |  | (22,506,662) | ​ |  | 17.55 | ​ | ​ | ​ | ​ | ​ | ​
Options forfeited |  | (1,114,116) | ​ |  | 29.16 | ​ | ​ | ​ | ​ | ​ | ​
Options outstanding at December 31, 2023 |  | 120,780,324 | ​ | ​ | 25.23 | ​ | 5.81 | ​ | ​ | ​ | ​
Options granted |  | 8,075,819 | ​ |  | 65.67 | ​ | ​ | ​ | ​ | ​ | ​
Options exercised |  | (22,523,753) | ​ |  | 19.83 | ​ | ​ | ​ | ​ | ​ | ​
Options forfeited |  | (628,199) | ​ |  | 36.21 | ​ | ​ | ​ | ​ | ​ | ​
Options outstanding at December 31, 2024 |  | 105,704,191 | ​ | $ | 29.40 | ​ | 5.53 | ​ | $ | 4,233.2 | ​
Vested and non-vested options expected to vest at December 31, 2024 |  | 103,031,174 | ​ | $ | 29.05 | ​ | 5.47 | ​ | $ | 4,162.6 | ​
Exercisable options at December 31, 2024 |  | 70,156,937 | ​ | $ | 23.65 | ​ | 4.45 | ​ | $ | 3,213.5 | ​
Summary of status of non-vested options and changes during the year | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted Average |
​ | ​ | ​ | ​ | Fair Value | ​
​ | ​ | Options | ​ | at Grant Date |
Non-vested options at January 1, 2024 |  | 45,047,962 | ​ | $ | 7.28 | ​
Options granted |  | 8,075,819 | ​ |  | 19.33 | ​
Options vested |  | (16,961,552) | ​ |  | 5.88 | ​
Options forfeited |  | (614,975) | ​ |  | 9.23 | ​
Non-vested options at December 31, 2024 |  | 35,547,254 | ​ | $ | 10.66 | ​
Summary of activity in the option plans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | 2024 |  | 2023 |  | 2022
Total intrinsic value of stock options exercised | $ | 980.3 | ​ | $ | 559.6 | ​ | $ | 245.1
Total fair value of stock options vested |  | 99.7 | ​ |  | 90.0 | ​ |  | 79.9
Schedule of fair value of stock options estimated at the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 | ​ | 2023 | ​ | 2022 | ​ | ​
Risk free interest rate | ​ | 4.4 | % | 3.8 | % | 2.7 | % | ​
Expected life |  | 4.9 | years | 4.9 | years | 4.8 | years | ​
Expected volatility |  | 28.0 | % | 28.0 | % | 25.9 | % | ​
Expected dividend yield |  | 1.0 | % | 1.0 | % | 1.0 | % | ​
Schedule of restricted stock activity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted Average | ​
​ | ​ | ​ | ​ | Fair Value | ​ | Remaining | ​
​ | ​ | Restricted | ​ | at Grant | ​ | Amortization | ​
​ |  | Shares |  | Date |  | Term (in years) |
Restricted shares outstanding at January 1, 2022 |  | 42,122 | ​ | $ | 33.46 |  | 0.38 | ​
Restricted shares granted |  | 42,624 | ​ |  | 33.80 | ​ | ​ | ​
Shares vested and issued |  | (42,122) | ​ |  | 33.46 | ​ | ​ | ​
Restricted shares outstanding at December 31, 2022 |  | 42,624 | ​ |  | 33.80 |  | 0.37 | ​
Restricted shares granted |  | — | ​ |  | — | ​ | ​ | ​
Shares vested and issued |  | (42,624) | ​ |  | 33.80 | ​ | ​ | ​
Restricted shares outstanding at December 31, 2023 |  | — | ​ | ​ | — |  | ​ | ​
Restricted shares granted |  | 21,840 | ​ |  | 65.96 | ​ | ​ | ​
Shares vested and issued |  | — | ​ |  | — | ​ | ​ | ​
Restricted shares outstanding at December 31, 2024 |  | 21,840 |  | $ | 65.96 |  | 0.36 | ​
Schedules of dividends | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 | ​ | 2023 | ​ | 2022
First Quarter | ​ | $ | 0.11 | ​ | $ | 0.105 | ​ | $ | 0.10
Second Quarter | ​ | ​ | 0.11 | ​ | ​ | 0.105 | ​ | ​ | 0.10
Third Quarter | ​ | ​ | 0.165 | ​ | ​ | 0.105 | ​ | ​ | 0.10
Fourth Quarter | ​ | ​ | 0.165 | ​ | ​ | 0.11 | ​ | ​ | 0.105
Total | ​ | $ | 0.55 | ​ | $ | 0.425 | ​ | $ | 0.405
​ Dividends declared and paid for the years ended December 31, 2024, 2023 and 2022 were as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2024 | ​ | 2023 | ​ | 2022
Dividends declared | ​ | $ | 662.9 | ​ | $ | 507.4 | ​ | $ | 482.6
Dividends paid (including those declared in the prior year) | ​ |  | 595.1 | ​ |  | 500.6 | ​ |  | 477.4
Schedule of components comprising Accumulated other comprehensive income (loss) included in equity | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Foreign | ​ | Unrealized | ​ | Pension and | ​ | Accumulated |
​ | ​ | Currency | ​ | Gain (Loss) | ​ | Postretirement | ​ | Other | ​
​ | ​ | Translation | ​ | on Hedging | ​ | Benefit Plan | ​ | Comprehensive |
​ |  | Adjustments |  | Activities |  | Adjustment |  | (Loss) Income |
Balance at January 1, 2022 | ​ | $ | (152.8) | ​ | $ | 0.1 | ​ | $ | (133.8) | ​ | $ | (286.5) | ​
Other comprehensive income (loss) before reclassifications, net of tax of nil, nil and ($0.4), respectively | ​ | ​ | (260.2) | ​ | ​ | (0.1) | ​ | ​ | (1.4) | ​ | ​ | (261.7) | ​
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax of ($4.3) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 13.2 | ​ | ​ | 13.2 | ​
Balance at December 31, 2022 | ​ |  | (413.0) | ​ |  | — | ​ |  | (122.0) | ​ |  | (535.0) | ​
Other comprehensive income (loss) before reclassifications, net of tax of nil, nil and $1.1, respectively | ​ | ​ | 0.3 | ​ | ​ | — | ​ | ​ | (2.0) | ​ | ​ | (1.7) | ​
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax of ($1.0) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3.1 | ​ | ​ | 3.1 | ​
Balance at December 31, 2023 | ​ |  | (412.7) | ​ |  | — | ​ |  | (120.9) | ​ |  | (533.6) | ​
Other comprehensive income (loss) before reclassifications, net of tax of nil, nil and ($5.2), respectively | ​ | ​ | (199.3) | ​ | ​ | — | ​ | ​ | 13.1 | ​ | ​ | (186.2) | ​
Amounts reclassified from Accumulated other comprehensive income (loss) to earnings, net of tax of ($1.1) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3.5 | ​ | ​ | 3.5 | ​
Balance at December 31, 2024 | ​ | $ | (612.0) | ​ | $ | — | ​ | $ | (104.3) | ​ | $ | (716.3) | ​

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