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Schedule II - Valuation And Qualifying Accounts And Reserves (Tables)
 12 Months Ended
Dec. 31, 2011
Schedule to Financial Statments [Abstract]  
Valuation and Qualifying Accounts
Schedule II

LABORATORY CORPORATION OF AMERICA HOLDINGS AND SUBSIDIARIES

VALUATION AND QUALIFYING ACCOUNTS AND RESERVES
Years Ended December 31, 2011, 2010 and 2009
(Dollars in millions)

 
 
 
Additions
 
 
 
 
 
Balance
at
beginning
of year
 
Charged
to
Costs and
Expense
 
Additions
as a
Result of
Acquisitions
 
(1)
Other
(Deductions)Additions
 
Balance
at end
of year
Year ended December 31, 2011:
 
 
 
 
 
 
 

 
 
Applied against asset accounts:
 
 
 
 
 
 
 

 
 
Allowance for doubtful accounts
$
149.2

 
$
255.1

 
$
—

 
$
(206.7
)
 
$
197.6

Valuation allowance-deferred tax assets
$
11.4

 
$
3.1

 
$
—

 
$
(0.1
)
 
$
14.4

Year ended December 31, 2010:
 

 
 

 
 

 
 

 
 

Applied against asset accounts:
 

 
 

 
 

 
 

 
 

Allowance for doubtful accounts
$
173.1

 
$
241.5

 
$
—

 
$
(265.4
)
 
$
149.2

Valuation allowance-deferred tax assets
$
3.9

 
$
7.7

 
$
—

 
$
(0.2
)
 
$
11.4

Year ended December 31, 2009:
 

 
 

 
 

 
 

 
 

Applied against asset accounts:
 

 
 

 
 

 
 

 
 

Allowance for doubtful accounts
$
161.0

 
$
248.9

 
$
4.8

 
$
(241.6
)
 
$
173.1

Valuation allowance-deferred tax assets
$
3.9

 
$
—

 
$
—

 
$
—

 
$
3.9


(1) Other (Deductions) Additions consists primarily of write-offs of accounts receivable amounts.