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Stock Based Compensation Plans - Schedule of Share Based Compensation Stock Options (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Share-Based Payment Arrangement [Abstract] |  |  |  |
Intrinsic Value of Stock Options Exercised | $ 12.5 | $ 97.0 | $ 81.3 | $ 107.7
Stock Compensation Expense Related to Stock Option Awards | $ 4.0 | $ 4.4 | $ 20.5 | $ 18.9
Issued Stock Options | 0.0 | 0.0 | 1.0 | 1.0
Weighted Average Fair Value of Stock Options issued (per share) | $ 0 | $ 0 | $ 29.9 | $ 24.03
Fair Value of Stock Options Issued | $ 0.0 | $ 0.0 | $ 30.8 | $ 24.7

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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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