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Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Change in the carrying amount of goodwill |  |  |
Balance at the beginning of the period | $ 1,736.4 | $ 1,691.6 | $ 1,314.6
Acquisitions | 0.4 | 51.3 | 382.4
Consolidation of a joint venture entity |  | 15.2 |
Purchase price allocation adjustments | (0.4) | 2.1 |
Sale of business |  | (17.1) |
Effect of foreign currency translation | (11.6) | (6.7) | (5.4)
Balance at the end of the period | 1,724.8 | $ 1,736.4 | $ 1,691.6
Accumulated impairment losses | $ 0.0 |  |

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