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Acquisitions (Tables)
 6 Months Ended
Jun. 30, 2012
Business Combinations [Abstract]  
Cash Paid For Current And Prior Years' Acquisitions
Details of cash paid for current and prior years' acquisitions are listed below.
 
Six months ended
June 30,
 
2012
 
2011
Cost of investment: current-year acquisitions
$
59.3

 
$
8.1

Cost of investment: prior-year acquisitions
35.4

 
80.5

Less: net cash acquired
(8.6
)
 
(2.4
)
Total cost of investment 1
86.1

 
86.2

 
 
 
 
Operating expense 2
3.2

 
0.2

 
 
 
 
Total cash paid for acquisitions
$
89.3

 
$
86.4

 
1 
Of the total cash paid, $34.5 and $47.6 for the six months ended June 30, 2012 and 2011, respectively, are classified under the financing section of the unaudited Consolidated Statements of Cash Flows within acquisition-related payments. These amounts relate to increases in our ownership interests in our consolidated subsidiaries, as well as deferred payments for acquisitions that closed on or after January 1, 2009. Of the total cash paid, $51.6 and $38.6 for the six months ended June 30, 2012 and 2011, respectively, are classified under the investing section of the unaudited Consolidated Statements of Cash Flows within acquisitions, including deferred payments, net of cash acquired. These amounts relate to initial payments for new transactions and deferred payments for acquisitions that closed prior to January 1, 2009.
2 
Represents cash payments made that were either in excess of the contractual value or contingent upon the future employment of the former owners of acquired companies.
Redeemable Noncontrolling Interests
The following table presents changes in our redeemable noncontrolling interests.
 
Six months ended
June 30,
 
2012
 
2011
Balance at beginning of period
$
243.4

 
$
291.2

Change in related noncontrolling interest balance

(3.7
)
 
(10.2
)
Changes in redemption value of redeemable noncontrolling interests:
 
 
 
Additions
1.0

 
5.5

Redemptions and other
(14.2
)
 
(25.4
)
Redemption value adjustments 1
(4.2
)
 
11.0

Balance at end of period
$
222.3

 
$
272.1

 
1 
Redeemable noncontrolling interests are reported at their estimated redemption value in each reporting period, but not less than their initial fair value. Any adjustment to the redemption value impacts retained earnings or additional paid-in capital, except adjustments as a result of currency translation.