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Supplementary Data (Notes) | 6 Months Ended
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Jun. 30, 2017
Supplementary Data [Abstract] |
Accrued Liabilities | Accrued Liabilities The following table presents the components of accrued liabilities.
| June 30, 2017 |  | December 31, 2016
Salaries, benefits and related expenses | $ | 301.4 |  |  | $ | 499.0 |
Acquisition obligations | 56.8 |  |  | 77.5 |
Office and related expenses | 45.4 |  |  | 46.7 |
Interest | 17.1 |  |  | 17.3 |
Other | 92.4 |  |  | 153.5 |
Total accrued liabilities | $ | 513.1 |  |  | $ | 794.0 |
Other Income, Net | Other (Expense) Income, Net Results of operations for the three and six months ended June 30, 2017 and 2016 include certain items that are not directly associated with our revenue-producing operations.
| Three months ended June 30, |  | Six months ended June 30,
| 2017 |  | 2016 |  | 2017 |  | 2016
Net losses on sales of businesses and investments | $ | (13.1 | ) |  | $ | (2.2 | ) |  | $ | (12.1 | ) |  | $ | (18.5 | )
Other (expense) income, net | (2.3 | ) |  | 2.6 |  |  | (2.5 | ) |  | (0.3 | )
Total other (expense) income, net | $ | (15.4 | ) |  | $ | 0.4 |  |  | $ | (14.6 | ) |  | $ | (18.8 | )
Net Losses on Sales of Businesses and Investments – During the three and six months ended June 30, 2017 and 2016, the amounts recognized were related to sales of businesses and the classification of certain assets and liabilities, consisting primarily of accounts receivable and accounts payable, respectively, as held for sale within our IAN operating segment.
Share Repurchase Program | Share Repurchase Program In February 2017, our Board of Directors (the "Board") authorized a new share repurchase program to repurchase from time to time up to $300.0, excluding fees, of our common stock, which was in addition to the remaining amount available to be repurchased from the $300.0 authorization made by the Board in February 2016. We may effect such repurchases through open market purchases, trading plans established in accordance with SEC rules, derivative transactions or other means. We expect to continue to repurchase our common stock in future periods, although the timing and amount of the repurchases will depend on market conditions and other funding requirements. The following table presents our share repurchase activity under our share repurchase programs for the six months ended June 30, 2017 and 2016.
| Six months ended June 30,
| 2017 |  | 2016
Number of shares repurchased | 4.8 |  |  | 5.0 |
Aggregate cost, including fees | $ | 115.0 |  |  | $ | 112.5 |
Average price per share, including fees | $ | 24.13 |  |  | $ | 22.47 |
As of June 30, 2017, $340.4, excluding fees, remains available for repurchase under the share repurchase programs. The share repurchase programs have no expiration date.

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