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Stockholders' Equity - Schedule of Amounts Reclassified from AOCL (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, net of tax | $ (98.6) | $ (8.2) | $ 6.2
Investment Securities |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, Provision for income taxes | (0.8) | (0.1) | (0.1)
Reclassification from AOCL, net of tax | 2.9 | 0.5 | 0.5
Investment Securities | Revenues |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax | 3.7 | 0.6 | 0.6
Hedging Activities |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, Provision for income taxes |  | 0.1 | (0.1)
Reclassification from AOCL, net of tax | (7.5) | 0.7 | 14.1
Hedging Activities | Foreign currency contracts | Revenues |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax | 7.6 | 1.2 | 14.2
Hedging Activities | Interest rate contracts | Interest Expense |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax | (0.6) | (0.6) |
Hedging Activities | Interest rate contracts | Other Income/(Expense), net |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax | 0.7 |  |
Defined benefit plans |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, Provision for income taxes | 25.7 | 2.7 | 2.4
Reclassification from AOCL, net of tax | (94.0) | (9.4) | (8.4)
Defined benefit plans | Other Income/(Expense), net |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax | (9.9) | $ (12.1) | $ (10.8)
Defined benefit plans | Pension Settlement Charges |  |  |
Accumulated other comprehensive income (loss) |  |  |
Reclassification from AOCL, before tax | $ (109.8) |  |

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