| 2017 | 2016 | |||||||
| Balance at end of previous year | 30,511.2 | 30,953.1 | ||||||
| Effect of movements in foreign exchange | 489.7 | (2,388.9 | ) | |||||
Acquisition and disposal through business combinations (i) | 401.0 | 1,947.0 | ||||||
| Balance at the end of year | 31,401.9 | 30,511.2 | ||||||