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Schedule II
 12 Months Ended
Dec. 31, 2011
Schedule II [Abstract]  
Valuation and Qualifying Accounts and Reserves [Text Block]
Schedule II

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Valuation and Qualifying Accounts and Reserves
 
Balance at Beginning of Period
 
 Additions Charged Other to Income Charges
Deductions from
Reserves (a)
Balance at End of
Period
 
Millions
 
 
 
 
 
 
Reserve Deducted from Related Assets
 
 
 
 
 
 
Reserve For Uncollectible Accounts
 
 
 
 
 
 
2009 Trade Accounts Receivable

$0.7

 

$1.3

—


$1.1


$0.9

Finance Receivables – Long-Term

$0.1

 

$0.3

—

—


$0.4

2010 Trade Accounts Receivable

$0.9

 

$1.1

—


$1.1


$0.9

Finance Receivables – Long-Term

$0.4

 

$0.8

—


$0.4


$0.8

2011 Trade Accounts Receivable

$0.9

 

$1.3

—


$1.3


$0.9

Finance Receivables – Long-Term

$0.8

 

$0.1

—


$0.3


$0.6

Deferred Asset Valuation Allowance
 
 
 
 
 
 
2009 Deferred Tax Assets

$0.4

 
$(0.1)
—

—


$0.3

2010 Deferred Tax Assets

$0.3

 

$0.2

—

—


$0.5

2011 Deferred Tax Assets

$0.5

 
$(0.1)
—

—


$0.4

(a)
Includes uncollectible accounts written off.