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Intangible Assets | 12 Months Ended
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Dec. 31, 2017
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Intangible Assets | 13. Intangible Assets
|  | Client Relationships $ |  |  | Contract Backlog $ |  |  | Software $ |  |  | Other $ |  |  | Total $ |  |  | Total Lease Disadvantage (note 21) $ |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2015 |  |  | 146.3 |  |  |  | 12.9 |  |  |  | 63.0 |  |  |  | 9.9 |  |  |  | 232.1 |  |  |  | (8.1) |
Additions |  |  | - |  |  |  | - |  |  |  | 25.7 |  |  |  | - |  |  |  | 25.7 |  |  |  | - |
Additions – internal development |  |  | - |  |  |  | - |  |  |  | 0.6 |  |  |  | - |  |  |  | 0.6 |  |  |  | - |
Additions arising on acquisitions |  |  | 246.9 |  |  |  | 50.6 |  |  |  | 27.6 |  |  |  | 29.1 |  |  |  | 354.2 |  |  |  | (2.8) |
Removal of fully amortized assets |  |  | (0.3) |  |  |  | (9.5) |  |  |  | (16.5) |  |  |  | (1.5) |  |  |  | (27.8) |  |  |  | 0.5 |
Impact of foreign exchange |  |  | 6.1 |  |  |  | 1.5 |  |  |  | (2.8) |  |  |  | 0.9 |  |  |  | 5.7 |  |  |  | 0.1 |
December 31, 2016 |  |  | 399.0 |  |  |  | 55.5 |  |  |  | 97.6 |  |  |  | 38.4 |  |  |  | 590.5 |  |  |  | (10.3) |
Additions |  |  | - |  |  |  | - |  |  |  | 5.7 |  |  |  | - |  |  |  | 5.7 |  |  |  | - |
Additions arising on acquisitions |  |  | 3.2 |  |  |  | 2.7 |  |  |  | - |  |  |  | 0.2 |  |  |  | 6.1 |  |  |  | - |
Disposals – Innovyze |  |  | (78.1) |  |  |  | - |  |  |  | (19.1) |  |  |  | (6.1) |  |  |  | (103.3) |  |  |  | - |
Disposals – other |  |  | - |  |  |  | - |  |  |  | (3.3) |  |  |  | - |  |  |  | (3.3) |  |  |  | - |
Removal of fully amortized assets |  |  | (13.8) |  |  |  | (6.2) |  |  |  | (15.7) |  |  |  | (3.1) |  |  |  | (38.8) |  |  |  | 2.5 |
Impact of foreign exchange |  |  | (20.8) |  |  |  | (4.1) |  |  |  | 0.4 |  |  |  | (1.9) |  |  |  | (26.4) |  |  |  | 0.6 |
December 31, 2017 |  |  | 289.5 |  |  |  | 47.9 |  |  |  | 65.6 |  |  |  | 27.5 |  |  |  | 430.5 |  |  |  | (7.2) |
Accumulated amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2015 |  |  | 59.3 |  |  |  | 6.0 |  |  |  | 25.4 |  |  |  | 3.3 |  |  |  | 94.0 |  |  |  | (4.1) |
Current year amortization |  |  | 26.8 |  |  |  | 22.3 |  |  |  | 21.6 |  |  |  | 6.9 |  |  |  | 77.6 |  |  |  | (1.9) |
Removal of fully amortized assets |  |  | (0.3) |  |  |  | (9.5) |  |  |  | (16.5) |  |  |  | (1.5) |  |  |  | (27.8) |  |  |  | 0.4 |
Impact of foreign exchange |  |  | (0.8) |  |  |  | 0.4 |  |  |  | (2.3) |  |  |  | (0.1) |  |  |  | (2.8) |  |  |  | 0.1 |
December 31, 2016 |  |  | 85.0 |  |  |  | 19.2 |  |  |  | 28.2 |  |  |  | 8.6 |  |  |  | 141.0 |  |  |  | (5.5) |
Current year amortization |  |  | 30.2 |  |  |  | 26.4 |  |  |  | 17.2 |  |  |  | 8.3 |  |  |  | 82.1 |  |  |  | (1.9) |
Disposals – Innovyze |  |  | (7.2) |  |  |  | - |  |  |  | (1.1) |  |  |  | - |  |  |  | (8.3) |  |  |  | - |
Disposals – other |  |  | - |  |  |  | - |  |  |  | (2.7) |  |  |  | - |  |  |  | (2.7) |  |  |  | - |
Removal of fully amortized assets |  |  | (13.8) |  |  |  | (6.2) |  |  |  | (15.7) |  |  |  | (3.1) |  |  |  | (38.8) |  |  |  | 2.5 |
Impact of foreign exchange |  |  | (3.8) |  |  |  | (1.8) |  |  |  | 1.0 |  |  |  | (0.6) |  |  |  | (5.2) |  |  |  | 0.4 |
December 31, 2017 |  |  | 90.4 |  |  |  | 37.6 |  |  |  | 26.9 |  |  |  | 13.2 |  |  |  | 168.1 |  |  |  | (4.5) |
Net book value |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2016 |  |  | 314.0 |  |  |  | 36.3 |  |  |  | 69.4 |  |  |  | 29.8 |  |  |  | 449.5 |  |  |  | (4.8) |
December 31, 2017 |  |  | 199.1 |  |  |  | 10.3 |  |  |  | 38.7 |  |  |  | 14.3 |  |  |  | 262.4 |  |  |  | (2.7) |
Once an intangible asset is fully amortized, the gross carrying amount and related accumulated amortization are removed from the accounts. Software includes finance leases with a net book value of $16.5 (2016 – $23.0). In accordance with its accounting policies in note 4, the Company tests intangible assets for recoverability when events or changes in circumstances indicate that their carrying amount may not be recoverable. To determine indicators of impairment of intangible assets, the Company considers external sources of information such as prevailing economic and market conditions and internal sources of information such as the historical and expected financial performance of the intangible assets. If indicators of impairment are present, the Company determines recoverability based on an estimate of discounted cash flows, using the higher of either the value in use or the fair value less costs of disposal methods. The measurement of impairment loss is based on the amount that the carrying amount of an intangible asset exceeds its recoverable amount at the CGU level. As part of the impairment test, the Company updates its future cash flow assumptions and estimates, including factors such as current and future contracts with clients, margins, market conditions, and the useful lives of the assets. During 2017, the Company concluded that there were no indicators of impairment to intangible assets.

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