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Supplementary Data (Tables) | 9 Months Ended
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Sep. 30, 2016
Supplementary Data [Abstract] |
Accrued Liabilities | The following table presents the components of accrued liabilities.
| September 30, 2016 |  | December 31, 2015
Salaries, benefits and related expenses | $ | 386.9 |  |  | $ | 502.4 |
Acquisition obligations | 73.8 |  |  | 50.1 |
Office and related expenses | 42.9 |  |  | 51.0 |
Interest | 17.2 |  |  | 17.3 |
Other | 110.9 |  |  | 139.5 |
Total accrued liabilities | $ | 631.7 |  |  | $ | 760.3 |
Other (Expense) Income, Net | Results of operations for the three and nine months ended September 30, 2016 and 2015 include certain items that are not directly associated with our revenue-producing operations.
| Three months ended September 30, |  | Nine months ended September 30,
| 2016 |  | 2015 |  | 2016 |  | 2015
Gains (losses) on sales of businesses and investments | $ | 3.9 |  |  | $ | (37.6 | ) |  | $ | (14.6 | ) |  | $ | (37.8 | )
Other income, net | 2.2 |  |  | 0.4 |  |  | 3.5 |  |  | 1.4 |
Total other income (expense), net | $ | 6.1 |  |  | $ | (37.2 | ) |  | $ | (11.1 | ) |  | $ | (36.4 | )
Share Repurchase Program | The following table presents our share repurchase activity under our share repurchase programs for the nine months ended September 30, 2016 and 2015.
| Nine months ended September 30,
| 2016 |  | 2015
Number of shares repurchased | 8.5 |  |  | 8.5 |
Aggregate cost, including fees | $ | 193.3 |  |  | $ | 172.3 |
Average price per share, including fees | $ | 22.69 |  |  | $ | 20.36 |

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