Year ended December 31 | |||||||||||
2015 | 2016 | 2017 | |||||||||
Short-term employee benefits and costs | $ | 6.8 | $ | 6.2 | $ | 7.5 | |||||
Post-employment and other long-term benefits | 0.5 | 0.4 | 0.6 | ||||||||
Stock-based compensation (including DSUs to eligible directors) | 16.6 | 12.3 | 12.4 | ||||||||
$ | 23.9 | $ | 18.9 | $ | 20.5 | ||||||