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Business Combinations, Goodwill and Other Intangible Assets, Other Intangibles by Segment (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Identified intangibles, with finite useful lives, accumulated amortization, gross carrying amount | $ 475.6 | $ 366.2 | $ 163.7
Additions, net of adjustments | 126.0 | 206.0 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | (6.5) |  |
Impact of exchange rate movements | (10.1) | (3.5) |
Identified intangibles, with finite useful lives, accumulated amortization | (180.6) | (139.0) | (124.9)
Amortization expense | (47.8) | (16.6) |
Impact of exchange rate movements | 6.2 | 2.5 |
Net book value as of end of period | 295.0 | 227.2 |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |
2017 | 59.0 |  |
2018 | 48.8 |  |
2019 | 43.3 |  |
2020 | 37.4 |  |
2021 | 27.9 |  |
Thereafter | 69.8 |  |
Total | 286.2 |  |
LaSalle [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ (6.5) |  |
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 4 months 15 days |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |
2017 | $ 32.1 |  |
2018 | 25.1 |  |
2019 | 21.6 |  |
2020 | 18.2 |  |
2021 | 14.8 |  |
Thereafter | 49.0 |  |
Total | 160.8 |  |
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 | 171.6 | 8.6
Additions, net of adjustments | 21.5 | 163.0 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 0.0 |  |
Impact of exchange rate movements | 0.0 | 0.0 |
Identified intangibles, with finite useful lives, accumulated amortization | (32.3) | (8.6) | (2.8)
Amortization expense | (23.7) | (5.8) |
Impact of exchange rate movements | 0.0 | 0.0 |
Net book value as of end of period | 160.8 |  |
Other Intangible Assets [Member] |  |  |
Schedule of Finite and Indefinite lived Intangible Assets by Segment [Line Items] |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 0.0 |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 3 years 3 months 19 days |  |
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] |  |  |
2017 | $ 26.9 |  |
2018 | 23.7 |  |
2019 | 21.7 |  |
2020 | 19.2 |  |
2021 | 13.1 |  |
Thereafter | 20.8 |  |
Total | 125.4 |  |
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 | 167.1 | 125.5 | 94.8
Additions, net of adjustments | 41.8 | 30.8 |
Impact of exchange rate movements | (0.2) | (0.1) |
Identified intangibles, with finite useful lives, accumulated amortization | (98.7) | (88.4) | (82.1)
Amortization expense | (10.8) | (6.3) |
Impact of exchange rate movements | 0.5 | 0.0 |
Net book value as of end of period | 68.4 |  |
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 | 91.1 | 48.5 | 43.8
Additions, net of adjustments | 52.5 | 6.9 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 0.0 |  |
Impact of exchange rate movements | (9.9) | (2.2) |
Identified intangibles, with finite useful lives, accumulated amortization | (38.0) | (32.6) | (31.0)
Amortization expense | (11.0) | (3.8) |
Impact of exchange rate movements | 5.6 | 2.2 |
Net book value as of end of period | 53.1 |  |
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 | 24.2 | 14.3 | 9.5
Additions, net of adjustments | 10.2 | 5.3 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 0.0 |  |
Impact of exchange rate movements | (0.3) | (0.5) |
Identified intangibles, with finite useful lives, accumulated amortization | (11.5) | (9.3) | (8.9)
Amortization expense | (2.3) | (0.7) |
Impact of exchange rate movements | 0.1 | 0.3 |
Net book value as of end of period | 12.7 |  |
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 | 0.1 | 6.3 | 7.0
Additions, net of adjustments | 0.0 | 0.0 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | (6.5) |  |
Impact of exchange rate movements | 0.3 | (0.7) |
Identified intangibles, with finite useful lives, accumulated amortization | (0.1) | (0.1) | $ (0.1)
Amortization expense | 0.0 | 0.0 |
Impact of exchange rate movements | 0.0 | $ 0.0 |
Net book value as of end of period | $ 0.0 |  |

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