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Supplementary Data (Tables) | 6 Months Ended
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Jun. 30, 2012
Supplementary Data [Abstract] |
Accrued Liabilities | The following table presents the components of accrued liabilities.
| June 30, 2012 |  | December 31, 2011
Salaries, benefits and related expenses | $ | 349.8 |  |  | $ | 520.6 |
Office and related expenses | 46.6 |  |  | 57.9 |
Acquisition obligations | 15.1 |  |  | 43.7 |
Interest | 39.0 |  |  | 40.3 |
Professional fees | 21.8 |  |  | 25.3 |
Other | 121.6 |  |  | 139.3 |
Total accrued liabilities | $ | 593.9 |  |  | $ | 827.1 |
Other Income (Expense), net | Results of operations for the three and six months ended June 30, 2012 and 2011 include certain items that are not directly associated with our revenue-producing operations.
| Three months ended June 30, |  | Six months ended June 30,
| 2012 |  | 2011 |  | 2012 |  | 2011
Gains (losses) on sales of businesses and investments | $ | 1.6 |  |  | $ | 0.3 |  |  | $ | (1.8 | ) |  | $ | (6.2 | )
Vendor discounts and credit adjustments | 2.5 |  |  | 2.8 |  |  | 4.9 |  |  | 2.9 |
Other income, net | 0.6 |  |  | 2.2 |  |  | 0.3 |  |  | 2.5 |
Total other income (expense), net | $ | 4.7 |  |  | $ | 5.3 |  |  | $ | 3.4 |  |  | $ | (0.8 | )
Share Repurchase Program | The following table presents our share repurchase activity under our share repurchase programs.
| Six months ended June 30,
| 2012 |  | 2011
Number of shares repurchased | 11.0 |  |  | 12.0 |
Aggregate cost, including fees | $ | 118.1 |  |  | $ | 139.0 |
Average price per share, including fees | $ | 10.78 |  |  | $ | 11.61 |

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