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Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 2011
Comprehensive Income [Abstract]  
Comprehensive income (loss) attributable to Questar
Consolidated comprehensive income (loss) attributable to Questar is shown below:

 
3 Months Ended
June 30,
6 Months Ended
June 30,
12 Months Ended
June 30,
 
2011
2010
2011
2010
2011
2010
 
(in millions)
Net income
$40.3 
$ 98.2 
$110.2 
$249.1 
$201.6 
$498.8 
Other comprehensive income (loss)
           
  Employee benefits
- 
25.5 
- 
25.5 
(4.0)
73.3 
  Long-term investment
- 
- 
- 
0.1 
- 
0.1 
  Interest rate cash flow hedges
0.8 
- 
0.8 
- 
0.8 
- 
  Discontinued operations
           
    Change in unrealized fair value of derivatives held by QEP
- 
(437.9)
- 
(138.7)
- 
(403.8)
  Income taxes
(0.3)
153.3 
(0.3)
42.0 
1.1 
122.3 
  Net other comprehensive income (loss)
0.5 
(259.1)
0.5 
(71.1)
(2.1)
(208.1)
Comprehensive income (loss)
40.8 
(160.9)
110.7 
178.0 
199.5 
290.7 
Discontinued operations, noncontrolling interest
- 
(0.7)
- 
(1.3)
- 
(2.8)
Comprehensive income (loss) attributable to Questar
$40.8 
($161.6)
$110.7 
$176.7 
$199.5 
$287.9 
Accumulated other comprehensive income (loss)
The components of Accumulated Other Comprehensive Income (Loss) (AOCI), net of income taxes, shown on Questar's Condensed Consolidated Balance Sheets are as follows:
 
June 30, 2011
June 30, 2010
Dec. 31, 2010
 
(in millions)
Employee benefits
($104.1)
($101.5)
($104.1)
Long-term investment
0.1 
0.1 
0.1 
Interest rate cash flow hedges
0.5 
- 
- 
Accumulated Other Comprehensive (Loss)
($103.5)
($101.4)
($104.0)