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Business Combinations, Goodwill and Other Intangible Assets, Other Intangibles by Segment (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Identified intangibles, with finite useful lives, accumulated amortization, gross carrying amount |  | $ 470.9 | $ 475.6
Additions, net of adjustments (1) | $ 107.0 | 75.9 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | (6.5)
Adjustment for fully amortized intangibles | (64.4) | (90.2) |
Impact of exchange rate movements | (6.8) | (9.6) |
Intangible Assets, Gross (Excluding Goodwill) | 506.7 |  |
Identified intangibles, with finite useful lives, accumulated amortization | (169.8) | (165.9) | (180.6)
Amortization expense, net (2) | (72.2) | (71.8) |
Accumulated Amortization Adjustment for fully Amortized Intangibles | 64.4 | 90.2 |
Impact of exchange rate movements | 3.9 | 3.7 |
Net book value as of end of period | 336.9 | 305.0 |
Servicing Asset at Amortized Cost, Other than Temporary Impairments | 11.4 | 10.8 |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |
2018 | 55.9 |  |
2019 | 49.9 |  |
2020 | 40.3 |  |
2021 | 31.9 |  |
2022 | 26.0 |  |
Thereafter | 83.7 |  |
Total | $ 287.7 |  |
Mortgage servicing rights [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 4 years 6 months 22 days |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |
2018 | $ 30.7 |  |
2019 | 28.9 |  |
2020 | 26.3 |  |
2021 | 23.5 |  |
2022 | 20.1 |  |
Thereafter | 64.3 |  |
Total | 193.8 |  |
Mortgage servicing rights [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Identified intangibles, with finite useful lives, accumulated amortization, gross carrying amount |  |  | 193.1
Additions, net of adjustments (1) | 49.9 | 66.6 |
Adjustment for fully amortized intangibles | (25.5) | (17.9) |
Impact of exchange rate movements | 0.0 | 0.0 |
Intangible Assets, Gross (Excluding Goodwill) | 266.2 | 241.8 |
Identified intangibles, with finite useful lives, accumulated amortization | (72.4) | (55.1) | (32.3)
Amortization expense, net (2) | (42.8) | (40.7) |
Accumulated Amortization Adjustment for fully Amortized Intangibles | 25.5 | 17.9 |
Impact of exchange rate movements | 0.0 | 0.0 |
Net book value as of end of period | $ 193.8 |  |
Other Intangible Assets [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 3 years 10 months 18 days |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |
2018 | $ 25.2 |  |
2019 | 21.0 |  |
2020 | 14.0 |  |
2021 | 8.4 |  |
2022 | 5.9 |  |
Thereafter | 19.4 |  |
Total | 93.9 |  |
Other Intangible Assets [Member] | Reportable Subsegments [Member] | Americas [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Identified intangibles, with finite useful lives, accumulated amortization, gross carrying amount |  | 117.0 | 167.1
Additions, net of adjustments (1) | 9.1 | 0.4 |
Adjustment for fully amortized intangibles | (36.2) | (50.7) |
Impact of exchange rate movements | (0.1) | (0.2) |
Intangible Assets, Gross (Excluding Goodwill) | 90.0 |  |
Identified intangibles, with finite useful lives, accumulated amortization | (38.8) | (61.3) | (98.7)
Amortization expense, net (2) | (14.0) | (13.7) |
Accumulated Amortization Adjustment for fully Amortized Intangibles | 36.2 | 50.7 |
Impact of exchange rate movements | 0.3 | 0.4 |
Net book value as of end of period | 51.2 |  |
Other Intangible Assets [Member] | Reportable Subsegments [Member] | EMEA [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Identified intangibles, with finite useful lives, accumulated amortization, gross carrying amount |  | 88.8 | 91.1
Additions, net of adjustments (1) | 0.3 | 3.1 |
Adjustment for fully amortized intangibles | (1.7) | (13.6) |
Impact of exchange rate movements | (4.3) | (8.2) |
Intangible Assets, Gross (Excluding Goodwill) | 83.1 |  |
Identified intangibles, with finite useful lives, accumulated amortization | (51.8) | (43.1) | (38.0)
Amortization expense, net (2) | (12.8) | (14.8) |
Accumulated Amortization Adjustment for fully Amortized Intangibles | 1.7 | 13.6 |
Impact of exchange rate movements | 2.4 | 3.9 |
Net book value as of end of period | 31.3 |  |
Other Intangible Assets [Member] | Reportable Subsegments [Member] | Asia Pacific [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Identified intangibles, with finite useful lives, accumulated amortization, gross carrying amount |  | 23.3 | 24.2
Additions, net of adjustments (1) | 3.8 | 5.8 |
Adjustment for fully amortized intangibles | (1.0) | (7.9) |
Impact of exchange rate movements | (2.6) | (1.2) |
Intangible Assets, Gross (Excluding Goodwill) | 23.5 |  |
Identified intangibles, with finite useful lives, accumulated amortization | (6.8) | (6.4) | (11.5)
Amortization expense, net (2) | (2.6) | (2.6) |
Accumulated Amortization Adjustment for fully Amortized Intangibles | 1.0 | 7.9 |
Impact of exchange rate movements | 1.2 | 0.2 |
Net book value as of end of period | 16.7 |  |
Other Intangible Assets [Member] | LaSalle [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Identified intangibles, with finite useful lives, accumulated amortization, gross carrying amount |  | 0.0 | 0.1
Additions, net of adjustments (1) | 43.9 | 0.0 |
Adjustment for fully amortized intangibles | 0.0 | (0.1) |
Impact of exchange rate movements | 0.0 | 0.0 |
Intangible Assets, Gross (Excluding Goodwill) | 43.9 |  |
Identified intangibles, with finite useful lives, accumulated amortization | 0.0 | 0.0 | $ (0.1)
Amortization expense, net (2) | 0.0 | 0.0 |
Accumulated Amortization Adjustment for fully Amortized Intangibles | 0.0 | 0.1 |
Impact of exchange rate movements | 0.0 | $ 0.0 |
Net book value as of end of period | $ 43.9 |  |

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