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Acquisitions Cash Paid For Current And Prior Years' Acquisitions (Tables) | 12 Months Ended
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Dec. 31, 2016
Business Combinations [Abstract] |
Cash Paid For Current And Prior Years' Acquisitions [Table Text Block] | Details of cash paid for current and prior years' acquisitions are listed below.
| Years ended December 31,
| 2016 |  | 2015 |  | 2014
Cost of investment: current-year acquisitions | $ | 65.7 |  |  | $ | 37.8 |  |  | $ | 97.3 |
Cost of investment: prior-year acquisitions | 40.7 |  |  | 53.1 |  |  | 14.0 |
Less: net cash acquired | (13.6 | ) |  | (9.2 | ) |  | (29.9 | )
Total cost of investment | 92.8 |  |  | 81.7 |  |  | 81.4 |
Operating expense 1 | 19.1 |  |  | 18.4 |  |  | 3.4 |
Total cash paid for acquisitions 2 | $ | 111.9 |  |  | $ | 100.1 |  |  | $ | 84.8 |
1 | Represents cash payments made that were either in excess of the initial value of contingent payments or contingent upon the future employment of the former owners of the acquired companies and are recorded in the operating section of the Consolidated Statements of Cash Flows.
2 | Of the total cash paid for acquisitions, $52.0, $28.6 and $67.8 for the years ended December 31, 2016, 2015 and 2014, respectively, are classified under the investing section of the Consolidated Statements of Cash Flows as acquisitions, net of cash acquired. These amounts relate to initial payments for new transactions. Of the total cash paid for acquisitions, $40.8, $53.1 and $13.6 for the years ended December 31, 2016, 2015 and 2014, respectively, are classified under the financing section of the Consolidated Statements of Cash Flows as acquisition-related payments. These amounts relate to deferred payments and increases in our ownership interest for prior acquisitions.

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