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Schedule II (Tables)
12 Months Ended
Dec. 31, 2012
Valuation and Qualifying Accounts Disclosure [Line Items]  
Schedule II Valuation and Qualifying Accounts [Table Text Block]
 
 
Additions
 
 
Description
Balance at Beginning of Period
Charged to Costs and Expenses
Deductions (A)
Balance at End of Period
(In millions)
Balance at December 31, 2010
 
 
 
 
Reserve for Uncollectible Accounts
$
2.4

$
2.6

$
3.1

$
1.9

Balance at December 31, 2011
 
 
 
 
Reserve for Uncollectible Accounts
$
1.9

$
5.8

$
3.9

$
3.8

Balance at December 31, 2012
 
 
 
 
Reserve for Uncollectible Accounts
$
3.8

$
3.3

$
4.5

$
2.6

(A)
Uncollectible accounts receivable written off, net of recoveries.