2013 | 2012 | 2011 | ||||||||||
Net (loss) gain on dispositions of securities and property | $ | (0.5 | ) | $ | (1.0 | ) | $ | 0.9 | ||||
Interest income | 9.8 | 7.8 | 6.0 | |||||||||
Royalty income | 3.3 | 2.3 | 3.6 | |||||||||
Environmental charges | (13.5 | ) | (9.3 | ) | (4.5 | ) | ||||||
Other | 6.6 | (4.8 | ) | (8.1 | ) | |||||||
Other income (expense) | $ | 5.7 | $ | (5.0 | ) | $ | (2.1 | ) |