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Derivatives and Hedge Accounting Activities (Tables)
 9 Months Ended
Sep. 30, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Notional Amounts of Outstanding Derivative Positions
The following table presents the volume of Questar Gas' derivative activity at September 30, 2016. These volumes are based on open derivative positions and represent the combined absolute value of their long and short positions, except in the case of offsetting transactions, for which they represent the absolute value of the net volume of their long and short positions.
 
Current
Noncurrent
Natural Gas (bcf):
 
 
     Fixed price(1)
7.7

34.1

(1) Includes options.
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value
The following table presents the fair values of Questar Gas' derivatives and where they are presented in its Condensed Balance Sheets. Questar Gas did not have any derivative balances at December 31, 2015. 

 
Fair Value -
Derivatives not under
Hedge 
Accounting
Total Fair Value
At September 30, 2016
(millions)
ASSETS
 
 
Current Assets
 
 
Commodity
$
0.4

$
0.4

Total current derivative assets(1)
0.4

0.4

Noncurrent Assets
 
 
Commodity
1.2

1.2

Total noncurrent derivative assets(2)
1.2

1.2

Total derivative assets
$
1.6

$
1.6

LIABILITIES
 
 
Current Liabilities
 
 
Commodity
$
0.1

$
0.1

Total current derivative liabilities(3)
0.1

0.1

Total derivative liabilities
$
0.1

$
0.1


(1) Current derivative assets are presented in prepaid expenses and other current assets in Questar Gas’ Condensed Balance Sheets.
(2) Noncurrent derivative assets are presented in other noncurrent assets in Questar Gas’ Condensed Balance Sheets.
(3) Current derivative liabilities are presented in other current liabilities in Questar Gas’ Condensed Balance Sheets.