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Stockholders' Equity - Schedule of Amounts Reclassified from AOCL (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, net of tax | $ 18.2 | $ 57.9 | $ (98.6)
Investment Securities |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, Provision for income taxes | 1.0 | 1.7 | (0.8)
Reclassification from AOCL, net of tax | (5.6) | (7.2) | 2.9
Investment Securities | Revenues |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax | (6.6) | (8.9) | 3.7
Hedging Activities |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, Provision for income taxes | (0.2) | (0.4) |
Reclassification from AOCL, net of tax | 23.8 | 47.3 | (7.5)
Hedging Activities | Foreign currency contracts | Revenues |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax | 23.9 | 47.7 | (7.6)
Hedging Activities | Interest rate contracts | Interest Expense |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax | $ 0.1 |  | (0.6)
Hedging Activities | Interest rate contracts | Other expense, net |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax |  |  | 0.7
Foreign Currency Translation |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, net of tax |  | 17.8 |
Foreign Currency Translation | Gain on Divestiture of Business |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax |  | $ 17.8 |
Defined benefit plans |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, Provision for income taxes |  |  | 25.7
Reclassification from AOCL, net of tax |  |  | (94.0)
Defined benefit plans | Other expense, net |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax |  |  | (9.9)
Defined benefit plans | Pension Settlement Charges |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax |  |  | $ (109.8)

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