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Business Combinations, Goodwill and Other Intangible Assets, Other Intangibles by Segment (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Additions, net of adjustments (1) | $ 160.2 | $ 371.3 |
Adjustment for fully amortized intangibles | (76.8) | (114.0) |
Impact of exchange rate movements | (6.2) | (5.3) |
Intangible Assets, Gross (Excluding Goodwill) | 1,304.3 | 1,227.1 | $ 975.1
Identified intangibles, with finite useful lives, accumulated amortization | (445.8) | (340.1) | (295.3)
Amortization expense, net (2) | (184.8) | (159.9) |
Accumulated Amortization Adjustment for fully Amortized Intangibles | 76.8 | 114.0 |
Impact of exchange rate movements | 2.3 | (1.1) |
Net book value as of end of period | 858.5 | 887.0 |
Servicing Asset at Amortized Cost, Other than Temporary Impairments | 28.0 | 31.2 |
Valuation Allowance for Impairment of Recognized Servicing Assets, Additions (Deductions) for Expenses (Recoveries) |  | (0.1) |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |
2023 | 159.1 |  |
2024 | 147.9 |  |
2025 | 118.4 |  |
2026 | 81.5 |  |
2027 | 66.7 |  |
Thereafter | 236.7 |  |
Total | 810.3 |  |
Mortgage servicing rights [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Additions, net of adjustments (1) | 140.9 | 161.1 |
Adjustment for fully amortized intangibles | (63.3) | (63.5) |
Impact of exchange rate movements | 0.0 | 0.0 |
Intangible Assets, Gross (Excluding Goodwill) | 747.3 | 669.7 | 572.1
Identified intangibles, with finite useful lives, accumulated amortization | (242.2) | (191.0) | (147.8)
Amortization expense, net (2) | (114.5) | (106.7) |
Accumulated Amortization Adjustment for fully Amortized Intangibles | 63.3 | 63.5 |
Impact of exchange rate movements | 0.0 | 0.0 |
Net book value as of end of period | $ 505.1 | 478.7 |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 4 years 1 month 6 days |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |
2023 | $ 91.2 |  |
2024 | 85.3 |  |
2025 | 76.4 |  |
2026 | 63.1 |  |
2027 | 52.0 |  |
Thereafter | 137.1 |  |
Total | 505.1 |  |
Other Intangible Assets [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Additions, net of adjustments (1) | 19.3 | 210.2 |
Adjustment for fully amortized intangibles | (13.5) | (50.5) |
Impact of exchange rate movements | (6.2) | (5.3) |
Intangible Assets, Gross (Excluding Goodwill) | 557.0 | 557.4 | 403.0
Identified intangibles, with finite useful lives, accumulated amortization | (203.6) | (149.1) | $ (147.5)
Amortization expense, net (2) | (70.3) | (53.2) |
Accumulated Amortization Adjustment for fully Amortized Intangibles | 13.5 | 50.5 |
Impact of exchange rate movements | 2.3 | $ 1.1 |
Net book value as of end of period | $ 353.4 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 4 years 7 months 6 days |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |
2023 | $ 67.9 |  |
2024 | 62.6 |  |
2025 | 42.0 |  |
2026 | 18.4 |  |
2027 | 14.7 |  |
Thereafter | 99.6 |  |
Total | $ 305.2 |  |

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