Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Average depreciation, depletion and amortization rates of the Company's capitalized costs

The following represent average depreciation, depletion and amortization rates of the Company's capitalized costs:



	Year Ended December 31,
	2011			2010			2009
Cost-of-service gas and oil properties, per Mcfe	$	1.49		$	1.47		$	1.44
Questar Pipeline transportation, storage and other energy services	3.5		%	3.5		%	3.5		%
Questar Gas distribution plant	2.8		%	2.9		%	3.0		%

Amounts recorded in the income statement for the capitalization of funds used during construction and interest costs

Amounts recorded in the income statement for the capitalization of AFUDC and interest costs are disclosed in the table below:



	Year Ended December 31,
	2011		2010		2009
	(in millions)
AFUDC (recorded as an increase in interest and other income)
Wexpro	$	3.3	$	2.4	$	1.9
Questar Pipeline	1.1		0.3		0.7
Total AFUDC	$	4.4	$	2.7	$	2.6

Capitalized interest costs (recorded as a reduction of interest expense)
Questar Pipeline	$	0.5	$	1.0	$	0.9
Questar Gas	0.1		0.2		0.3
Total capitalized interest costs	$	0.6	$	1.2	$	1.2

Components of accumulated comprehensive income (loss) and the respective income taxes allocated

The components of consolidated AOCI, net of income taxes, as reported in Questar's Consolidated Balance Sheets, are shown below:



	December 31,
	2011			2010
	(in millions)
Pension liability	$	(182.7	)	$	(93.2	)
Postretirement benefits liability	(20.1		)	(10.9		)
Interest rate cash flow hedges	(23.4		)	—
Long-term investment	0.1			0.1
Accumulated other comprehensive (loss)	$	(226.1	)	$	(104.0	)

Income taxes allocated to each component of Questar's consolidated OCI for the year are shown in the table below. Expenses are in parentheses.



	Year Ended December 31,
	2011		2010			2009
	(in millions)
Pension liability	$	55.5	$	(7.0	)	$	(15.5	)
Postretirement benefits liability	5.7		(1.2		)	(2.8		)
Interest rate cash flow hedges	13.8		—			—
Discontinued operations, unrealized loss on derivatives	—		51.6			150.6
Income taxes	$	75.0	$	43.4		$	132.3

Component of Questar Pipeline AOCI and reconciliation of cash flow hedging AOCI

The component of consolidated AOCI, net of income taxes, as reported in Questar Pipeline's Consolidated Balance Sheets, is shown below:



	December 31,
	2011			2010
	(in millions)
Interest rate cash flow hedges	$	(23.4	)	$	—
Accumulated other comprehensive (loss)	$	(23.4	)	$	—

A reconciliation of the Company's beginning and ending after-tax AOCI balances related to interest rate cash flow hedging activities (see Note 5) is shown below. All cash flow hedging activity is attributable to Questar Pipeline.



	Year Ended December 31,
	2011			2010
	(in millions)
Beginning accumulated other comprehensive income (loss)	$	—		$	—
Net change associated with current period hedging transactions	(23.5		)	—
Net amount reclassified into earnings	0.1			—
Ending accumulated other comprehensive (loss)	$	(23.4	)	$	—

- Definition

This label may include the following: 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. Components of comprehensive income include: (1) foreign currency translation adjustments; (2) gains and losses on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (3) gains and losses on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (4) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (5) unrealized holding gains and losses on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (6) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (7) the net gain or loss and net prior service cost or credit for pension plans and other postretirement benefit plans.

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