XML 47 R42.htm IDEA: XBRL DOCUMENT v2.4.0.6
Schedule of Valuation and Qualifying Accounts (Tables)
 12 Months Ended
Dec. 31, 2011
Schedule to Financial Statements [Abstract]  
Schedule of Valuation and Qualifying Accounts
QUESTAR CORPORATION
Schedule of Valuation and Qualifying Accounts

Column A
Description
Column B
Beginning Balance
 
Column C Amounts charged
to expense
 
Column D Deductions for accounts written off and other
 
Column E
Ending Balance
 
(in millions)
Year Ended December 31, 2011
 
 
 
 
 
 
 
Allowance for bad debts
$
3.2

 
$
2.4

 
$
(2.4
)
 
$
3.2

Year Ended December 31, 2010
 
 
 
 
 
 
 
Allowance for bad debts
5.4

 
0.5

 
(2.7
)
 
3.2

Year Ended December 31, 2009
 
 
 
 
 
 
 
Allowance for bad debts
5.8

 
3.4

 
(3.8
)
 
5.4



QUESTAR PIPELINE COMPANY
Schedule of Valuation and Qualifying Accounts

Column A
Description
Column B
Beginning Balance
 
Column C Amounts charged
to expense
 
Column D Deductions for accounts written off and other
 
Column E
Ending Balance
 
(in millions)
Year Ended December 31, 2011
 
 
 
 
 
 
 
Allowance for bad debts
$
0.3

 
$
—

 
$
—

 
$
0.3

Year Ended December 31, 2010
 
 
 
 
 
 
 
Allowance for bad debts
0.3

 
—

 
—

 
0.3

Year Ended December 31, 2009
 
 
 
 
 
 
 
Allowance for bad debts
0.4

 
(0.1
)
 
—

 
0.3



QUESTAR GAS COMPANY
Schedule of Valuation and Qualifying Accounts

Column A
Description
Column B
Beginning Balance
 
Column C Amounts charged
to expense
 
Column D Deductions for accounts written off and other
 
Column E
Ending Balance
 
(in millions)
Year Ended December 31, 2011
 
 
 
 
 
 
 
Allowance for bad debts
$
2.9

 
$
2.4

 
$
(2.4
)
 
$
2.9

Year Ended December 31, 2010
 
 
 
 
 
 
 
Allowance for bad debts
5.1

 
0.5

 
(2.7
)
 
2.9

Year Ended December 31, 2009
 
 
 
 
 
 
 
Allowance for bad debts
5.4

 
3.5

 
(3.8
)
 
5.1