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GOODWILL AND INTANGIBLE ASSETS (Tables)
 9 Months Ended
Sep. 30, 2012
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in Carrying Amount of Goodwill
The changes in the carrying amount of goodwill for the nine-month period ended September 30, 2012 and for the year ended December 31, 2011 are as follows:

 
September 30,
2012
 
December 31, 2011
Balance as of January 1
$
2,681.8

 
$
2,601.3

Goodwill acquired during the period
196.8

 
86.2

Adjustments to goodwill
(1.2
)
 
(5.7
)
Balance at end of period
$
2,877.4

 
$
2,681.8
Components of identifiable intangible assets
The components of identifiable intangible assets are as follows:

 
September 30, 2012
 
December 31, 2011
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
Customer relationships
$
1,269.7

 
$
(468.3
)
 
$
1,187.5

 
$
(426.8
)
Patents, licenses and technology
146.7

 
(97.2
)
 
144.9

 
(88.3
)
Non-compete agreements
29.5

 
(18.4
)
 
28.1

 
(14.8
)
Trade names
131.3

 
(70.4
)
 
129.2

 
(61.3
)
Canadian licenses
749.6

 
—

 
722.2

 
—

 
$
2,326.8

 
$
(654.3
)
 
$
2,211.9

 
$
(591.2
)