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Acquisitions Redeemable Noncontrolling Interest (Tables)
 12 Months Ended
Dec. 31, 2015
Business Combinations [Abstract]  
Redeemable Noncontrolling Interest
The following table presents changes in our redeemable noncontrolling interests.
 
Years ended December 31,
 
2015
 
2014
 
2013
Balance at beginning of period
$
257.4

 
$
249.1

 
$
227.2

Change in related noncontrolling interest balance
0.8

 
3.2

 
4.6

Changes in redemption value of redeemable noncontrolling interests:
 
 
 
 
 
Additions
16.5

 
18.7

 
16.2

Redemptions and reclassifications
(25.1
)
 
(7.9
)
 
(2.3
)
Redemption value adjustments
2.3

 
(5.7
)
 
3.4

Balance at end of period
$
251.9

 
$
257.4

 
$
249.1