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Intangible Assets
 12 Months Ended
Dec. 31, 2022
Intangible assets other than goodwill [abstract]  
Intangible Assets Intangible Assets
Client
Relationships		Contract
Backlog		SoftwareOtherTotal
$$$$$
Cost
December 31, 2020325.0 2.6 39.3 2.0 368.9 
Additions— — 48.5 0.7 49.2 
Additions arising on acquisitions152.6 51.5 — 1.6 205.7 
Removal of fully amortized assets(8.7)(4.1)(13.0)(0.2)(26.0)
Impact of foreign exchange(5.7)0.2 (0.1)— (5.6)
December 31, 2021463.2 50.2 74.7 4.1 592.2 
Additions— — 25.7 — 25.7 
Additions arising on acquisitions13.1 1.7 0.5 — 15.3 
Removal of fully amortized assets(24.3)(6.1)(12.3)(1.7)(44.4)
Disposals— — — (1.4)(1.4)
Impact of foreign exchange19.9 2.8 0.4 0.2 23.3 
December 31, 2022471.9 48.6 89.0 1.2 610.7 
Accumulated amortization
December 31, 2020163.2 — 23.7 — 186.9 
Amortization32.5 6.8 20.4 0.3 60.0 
Removal of fully amortized assets(8.7)(4.1)(13.0)(0.2)(26.0)
Impact of foreign exchange(2.0)0.1 (0.1)— (2.0)
December 31, 2021185.0 2.8 31.0 0.1 218.9 
Amortization45.6 33.3 24.2 1.5 104.6 
Removal of fully amortized assets(24.3)(6.1)(12.3)(1.7)(44.4)
Impact of foreign exchange9.3 1.4 0.4 0.1 11.2 
December 31, 2022215.6 31.4 43.3 — 290.3 
Net book value
December 31, 2021278.2 47.4 43.7 4.0 373.3 
December 31, 2022256.3 17.2 45.7 1.2 320.4 

During 2022, the Company concluded that there were no indicators of impairment related to intangible assets.
The net book value of software acquired through software financing obligations is $32.7 (2021 - $33.5). In 2022, software additions through software financing obligations were $19.3 (2021 - $44.4) and have been excluded from the consolidated statement of cash flows (note 32).