Stock Based Compensation Plans and Other Benefit Plans - Schedule of Share Based Compensation Stock Options (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Intrinsic Value of Stock Options Exercised	$ 125.5	$ 32.1	$ 157.3
Stock Compensation Expense Related to Stock Option Awards	$ 26.3	$ 25.7	$ 23.3
Issued Stock Options	1.0	1.6	1.5
Weighted Average Fair Value of Stock Options issued (per share)	$ 24.06	$ 21.5	$ 17.32
Fair Value of Stock Options Issued	$ 24.9	$ 33.6	$ 26.6

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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.

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Net number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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The fair value of stock issued in noncash financing activities.

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Amount of noncash expense for option under share-based payment arrangement.

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