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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2012
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Net Rent Expense | Net rent expense is listed in the table below.
| Years ended December 31,
| 2012 |  | 2011 |  | 2010
Gross rent expense | $ | 358.5 |  |  | $ | 369.5 |  |  | $ | 365.2 |
Third-party sublease rental income | (17.5 | ) |  | (19.4 | ) |  | (20.0 | )
Net rent expense | $ | 341.0 |  |  | $ | 350.1 |  |  | $ | 345.2 |
Schedule of Future Minimum Lease Commitments | Cash amounts for future minimum lease commitments for office premises and equipment under non-cancelable leases, along with minimum sublease rental income to be received under non-cancelable subleases, are listed in the table below.
Period | Rent Obligations |  | Sublease Rental Income |  | Net Rent
2013 | $ | 309.1 |  |  | $ | (26.9 | ) |  | $ | 282.2 |
2014 | 275.8 |  |  | (14.7 | ) |  | 261.1 |
2015 | 243.4 |  |  | (7.3 | ) |  | 236.1 |
2016 | 200.3 |  |  | (2.1 | ) |  | 198.2 |
2017 | 164.2 |  |  | (0.6 | ) |  | 163.6 |
Thereafter | 675.8 |  |  | (0.3 | ) |  | 675.5 |
Total | $ | 1,868.6 |  |  | $ | (51.9 | ) |  | $ | 1,816.7 |
Schedule of Contingent Acquisition Obligations | The following table details the estimated future contingent acquisition obligations payable in cash as of December 31, 2012.
|  | 2013 |  | 2014 |  | 2015 |  | 2016 |  | 2017 |  | Thereafter |  | Total
Deferred acquisition payments |  | $ | 26.0 |  |  | $ | 12.4 |  |  | $ | 9.7 |  |  | $ | 46.4 |  |  | $ | 18.9 |  |  | $ | 2.0 |  |  | $ | 115.4 |
Redeemable noncontrolling interests and call options with affiliates 1 |  | 20.5 |  |  | 43.8 |  |  | 32.9 |  |  | 5.7 |  |  | 2.2 |  |  | 10.6 |  |  | 115.7 |
Total contingent acquisition payments |  | 46.5 |  |  | 56.2 |  |  | 42.6 |  |  | 52.1 |  |  | 21.1 |  |  | 12.6 |  |  | 231.1 |
Less: cash compensation expense included above |  | (0.7 | ) |  | (0.6 | ) |  | (0.8 | ) |  | (0.2 | ) |  | 0.0 |  |  | 0.0 |  |  | (2.3 | )
Total |  | $ | 45.8 |  |  | $ | 55.6 |  |  | $ | 41.8 |  |  | $ | 51.9 |  |  | $ | 21.1 |  |  | $ | 12.6 |  |  | $ | 228.8 |
1 | We have entered into certain acquisitions that contain both redeemable noncontrolling interests and call options with similar terms and conditions. We have certain redeemable noncontrolling interests that are exercisable at the discretion of the noncontrolling equity owners as of December 31, 2012. These estimated payments of $16.4 are included within the total payments expected to be made in 2013, and will continue to be carried forward into 2014 or beyond until exercised or expired. Redeemable noncontrolling interests are included in the table at current exercise price payable in cash, not at applicable redemption value in accordance with the authoritative guidance for classification and measurement of redeemable securities.

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- Definition Tabular disclosure of contingent payment arrangements including the terms that will result in payment and the accounting treatment that will be followed if such contingencies occur, including the potential impact on earnings per share if contingencies are to be settled in common stock of the entity. The description also may include the period over which amounts are expected to be paid, and changes in the amount since the previous reporting period. This also includes contingent options and commitments. + References No definition available. + Details
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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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- Definition Tabular disclosure of rental expense from operating leases for each period for which an income statement is presented with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717 + Details
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