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Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2011

A. Nature of Business

Questar Corporation (Questar or the Company) is a Rockies-based integrated natural gas company with three complementary and wholly owned lines of business:

- Wexpro Company (Wexpro) develops and produces natural gas from cost-of-service reserves for Questar Gas.

- Questar Pipeline Company (Questar Pipeline) operates interstate natural gas pipelines and storage facilities in the western

United States and provides other energy services.

- Questar Gas Company (Questar Gas) provides retail natural gas distribution in Utah, Wyoming and Idaho.

Questar is headquartered in Salt Lake City, Utah. Shares of Questar common stock trade on the New York Stock Exchange (NYSE:STR).

Principles of Consolidation

B. Principles of Consolidation

The consolidated financial statements contain the accounts of Questar and its majority-owned or controlled subsidiaries. The consolidated financial statements were prepared in accordance with U.S. generally accepted accounting principles (GAAP) and with the instructions for Annual Reports on Form 10-K and SEC Regulations S-X and S-K. All significant intercompany accounts and transactions have been eliminated in consolidation.

Effective May 18, 2010, Questar Market Resources, Inc., (Market Resources) a wholly owned subsidiary of Questar, merged with and into its newly-formed, wholly owned subsidiary, QEP, a Delaware corporation in order to reincorporate in the State of Delaware (Reincorporation Merger). The Reincorporation Merger was effected pursuant to an Agreement and Plan of Merger entered into between Market Resources and QEP. The Reincorporation Merger was approved by the boards of directors of Market Resources and QEP and submitted to a vote of, and approved by, Questar, as sole shareholder of Market Resources, and by Market Resources, as sole shareholder of QEP on May 18, 2010.

On June 30, 2010, Questar distributed all of the shares of common stock of QEP held by Questar to Questar shareholders in a tax-free, pro rata dividend (the Spinoff). Each Questar shareholder received one share of QEP common stock for each share of Questar common stock held (including fractional shares) at the close business on the record date. In connection therewith, QEP distributed Wexpro, a wholly owned subsidiary of QEP, to Questar. In addition, Questar contributed $250.0 million of equity to QEP prior to the Spinoff.

The financial information presented in this Annual Report recasts QEP's financial condition and operating results as discontinued operations for all periods presented through June 30, 2010, and reflects Wexpro's financial condition and operating results as a separate line of business. A summary of discontinued operations can be found in Note 15. Questar incurred $11.5 million of separation costs in 2010 in connection with the Spinoff.

Investment in Unconsolidated Affiliate

C. Investment in Unconsolidated Affiliate

Questar uses the equity method to account for its investment in an unconsolidated affiliate where it does not have control, but has significant influence. The investment in the unconsolidated affiliate on the Company's consolidated balance sheets equals the Company's proportionate share of equity reported by the unconsolidated affiliate. Investment is assessed for possible impairment when events indicate that the fair value of the investment may be below the Company's carrying value. When such a condition is deemed to be other than temporary, the carrying value of the investment is written down to its fair value, and the amount of the write-down is included in the determination of net income.

White River Hub, LLC, a limited liability company and FERC-regulated transporter of natural gas, is the single unconsolidated affiliate. Questar Pipeline owns 50% of White River Hub, LLC, and is the operator.

Use of Estimates

D. Use of Estimates

The preparation of financial statements and notes in conformity with GAAP requires that management formulate estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses and the disclosure of contingent assets and liabilities. The Company also incorporates estimates of proved developed gas and oil reserves in the calculation of depreciation, depletion and amortization rates of its gas and oil properties. Changes in estimated quantities of its reserves could impact the Company's reported financial results as well as disclosures regarding the quantities of proved gas and oil reserves. Actual results could differ from these estimates.

Revenue Recognition

E. Revenue Recognition

Wexpro

Wexpro recognizes revenues in the period that services are provided or products are delivered. Wexpro recovers its costs and receives an unlevered, after-tax return of approximately 20% on its investment base. In accordance with the Wexpro Agreement, production from the gas properties operated by Wexpro is delivered to Questar Gas at Wexpro's cost of providing this service including a return on Wexpro's investment. Wexpro sells crude-oil production from certain oil-producing properties at market prices with the revenues used to recover operating expenses and to provide Wexpro a return on its investment. Any operating income remaining after recovery of expenses and Wexpro's return on investment is divided between Questar Gas and Wexpro with Wexpro retaining 46%. Amounts received by Questar Gas from the sharing of Wexpro's oil income are used to reduce natural gas costs to utility customers.

Wexpro's investment base consists of its investment in commercial wells and related facilities and is adjusted for working capital and reduced for deferred income taxes and accumulated depreciation, depletion and amortization. Revenue associated with the sale of gas and oil is accounted for using the sales method, whereby revenue is recognized as gas and oil is sold to purchasers. Wexpro may collect revenues subject to possible refunds and establish reserves pending final calculation of the after-tax return on investments, which is adjusted annually.

Questar Pipeline

Questar Pipeline and subsidiaries recognize revenues in the period that services are provided. The straight fixed-variable rate design used by Questar Pipeline, which allows for recovery of substantially all fixed costs in the demand or reservation charge, reduces the earnings impact of volume changes on gas-transportation and storage operations. Rate-regulated companies may collect revenues subject to possible refunds and establish reserves pending final orders from regulatory agencies.

Questar Gas

Questar Gas records revenues in the period that gas is delivered, including gas delivered to residential and commercial customers but not billed as of the end of the accounting period. Unbilled gas deliveries are estimated for the period from the date meters are read to the end of the month. Approximately one-half month of revenue is estimated in any period. Gas costs and other variable costs are recorded on the same basis to ensure proper matching of revenues and expenses. Questar Gas's tariff allows for monthly adjustments to customer bills to approximate the effect of abnormal weather on non-gas revenues. The weather-normalization adjustment significantly reduces the impact of weather on gas-distribution earnings. The PSCU and PSCW approved a CET to promote energy conservation. Under the CET, Questar Gas non-gas revenues are decoupled from the volume of gas used by customers. The tariff specifies a margin per customer for each month with differences to be deferred and recovered from customers or refunded to customers through periodic rate adjustments. Rate adjustments occur every six months under the CET. The adjustments amortize deferred CET amounts over a 12-month period. These adjustments are limited to 5% of non-gas revenues. Questar Gas allows customers the option of paying an estimated fixed monthly bill throughout the year on a budget-billing program. The estimated payments are adjusted to actual usage annually. The budget-billing option does not impact revenue recognition.

Regulation

F. Regulation

Wexpro manages and produces cost-of-service reserves for gas utility affiliate Questar Gas under the terms of the Wexpro Agreement, a long-standing comprehensive agreement with the states of Utah and Wyoming (see Note 9).

Questar Pipeline is regulated by the FERC. Questar Gas is regulated by the PSCU and the PSCW. The Idaho Public Utilities Commission has contracted with the PSCU for rate oversight of Questar Gas operations in a small area of southeastern Idaho. These regulatory agencies establish rates for the storage, transportation and sale of natural gas. The regulatory agencies also regulate, among other things, the extension and enlargement or abandonment of jurisdictional natural gas facilities. Regulation is intended to permit the recovery, through rates, of the cost of service, including a return on investment.

The Company applies the regulatory accounting principles to the rate-regulated businesses. Under these principles, the Company records regulatory assets and liabilities that would not be otherwise recorded under GAAP for non-rate regulated entities. Regulatory assets and liabilities record probable future revenues or expenses associated with certain credits or charges that will be recovered from or refunded to customers through the rate-making process.

Questar Gas accounts for purchased-gas costs in accordance with procedures authorized by the PSCU and the PSCW. Purchased-gas costs that are different from those provided for in present rates are accumulated and recovered or credited through future rate changes. Questar Gas may hedge a portion of its natural gas supply to mitigate price fluctuations for gas-distribution customers. The regulatory commissions allow Questar Gas to record periodic mark-to-market adjustments for commodity-price derivatives in the purchased-gas-adjustment account. Questar did not have any commodity-price derivatives at December 31, 2011 or 2010. See Note 10 for a description and comparison of regulatory assets and liabilities as of December 31, 2011 and 2010.

Cash and Cash Equivalents

G. Cash and Cash Equivalents

Cash equivalents consist principally of repurchase agreements with maturities of three months or less. In almost all cases, the repurchase agreements are highly liquid investments in overnight securities made through commercial-bank accounts that result in available funds the next business day.

Notes Receivable and Notes Payable

H. Notes Receivable and Notes Payable

Notes receivable and notes payable represent pre-Spinoff interest bearing demand notes with former subsidiaries of Questar.

Property, Plant and Equipment

I. Property, Plant and Equipment

Property, plant and equipment balances are stated at historical cost. Maintenance and repair costs are expensed as incurred.

Cost-of-service gas and oil operations

The successful-efforts method of accounting is used for cost-of-service reserves developed and produced by Wexpro for gas utility affiliate Questar Gas. Cost-of-service reserves are properties for which the operations and return on investment are subject to the Wexpro Agreement (see Note 9). Under the successful-efforts method, Wexpro capitalizes the costs of acquiring leaseholds, drilling development wells, drilling successful exploratory wells, purchasing related support equipment and facilities. Geological and geophysical studies and other exploratory activities are expensed as incurred. Costs of production and general-corporate activities are expensed in the period incurred. A gain or loss is generally recognized on assets as they are retired from service.

Contributions-in-aid-of construction

Contributions-in-aid of construction

Customer contributions-in-aid of construction reduce plant unless the amounts are refundable to customers. Contributions for main-line extensions may be refundable to customers if additional customers connect to the main-line segment within five years. Refundable contributions are recorded as liabilities until refunded or the five-year period expires without additional customer connections. Amounts not refunded reduce plant. Capital expenditures in the Consolidated Statements of Cash Flows are reported net of non-refunded contributions.

Depreciation, depletion and amortization

Capitalized costs of development wells are depreciated on a field-by-field basis using the unit-of-production method and the estimated proved developed gas and oil reserves. Oil and NGL volumes are converted to natural gas equivalents using the ratio of one barrel of crude oil, condensate or NGL to 6,000 cubic feet of natural gas. The Company capitalizes an estimate of the fair value of future abandonment costs associated with cost-of-service reserves and depreciates these costs using a unit-of-production method.

Depreciation, depletion and amortization for the remaining Company properties is based upon rates that will systematically charge the costs of assets against income over the estimated useful lives of those assets using a straight-line method. Depreciation rates for Questar Pipeline and Questar Gas are established through rate proceedings.

Major categories of fixed assets in gas distribution, transportation and storage operations are grouped together and depreciated on a straight-line method. Gains and losses on asset disposals are recorded as adjustments in accumulated depreciation. The Company has not capitalized future-abandonment costs on a majority of its long-lived gas distribution and transportation assets due to a lack of a legal obligation to restore the area surrounding abandoned assets. In these cases, the regulatory agencies have opted to leave retired facilities in the ground undisturbed rather than excavate and dispose of the assets.

Impairment of Long-Lived Assets

J. Impairment of Long-Lived Assets

Proved gas and oil properties are evaluated on a field-by-field basis for potential impairment. Other properties are evaluated on a specific-asset basis or in groups of similar assets, as applicable. Impairment is indicated when a triggering event occurs and the sum of the estimated undiscounted future net cash flows of an evaluated asset is less than the asset's carrying value. Triggering events could include, but are not limited to, an impairment of gas and oil reserves caused by mechanical problems, faster-than-expected decline of reserves, lease-ownership issues, other-than-temporary decline in gas and oil prices and changes in the utilization of pipeline assets. If impairment is indicated, fair value is calculated using a discounted-cash-flow approach. Cash-flow estimates require forecasts and assumptions for many years into the future for a variety of factors, including commodity prices and operating costs. There were no impairments in 2011, 2010 or 2009.

Goodwill and Other Intangible Assets

K. Goodwill and Other Intangible Assets

Goodwill represents the excess of the amount paid over the fair value of net assets acquired in a business combination and is not subject to amortization. Goodwill and indefinite lived intangible assets are tested for impairment at a minimum of once a year or when a triggering event occurs. If a triggering event occurs, the undiscounted net cash flows of the intangible asset or entity to which the goodwill relates are evaluated. Impairment is indicated if undiscounted cash flows are less than the carrying value of the assets. The amount of the impairment is measured using a discounted cash flow model considering future revenues, operating costs, a risk-adjusted discount rate and other factors.

Capitalized Interest and Allowance for Funds Used During Construction

L. Capitalized Interest and Allowance for Funds Used During Construction

The Company capitalizes interest costs when applicable. The FERC, PSCU and PSCW require the capitalization of funds used during construction (AFUDC) during the construction period of rate-regulated plant and equipment. The Wexpro Agreement requires capitalization of AFUDC on cost-of-service construction projects.

Derivative Instruments and Hedging Activities

M. Derivative Instruments and Hedging Activities

The Company may elect to designate a derivative instrument as a hedge of exposure to changes in fair value or cash flows. A derivative instrument qualifies as a hedge if all of the following tests are met:


•	The item to be hedged exposes the Company to market risk.


•	The derivative reduces the risk exposure and is designated as a hedge at the inception of the hedging relationship.


•	At the inception of the hedge and throughout the hedge period, there is a high correlation between changes in the fair value of the derivative instrument and the fair value of the underlying hedged item.

If the hedged exposure is a fair value exposure, the gain or loss on the derivative instrument is recognized in earnings in the period of the change together with the offsetting gain or loss from the change in fair value of the hedged item. If the hedged exposure is a cash flow exposure, the effective portion of the gain or loss on the derivative instrument is reported initially as a component of accumulated other comprehensive income (loss) (AOCI) and subsequently reclassified into earnings when the forecasted transaction affects earnings. Any amount excluded from the assessment of hedge effectiveness, as well as the ineffective portion of the gain or loss, is reported currently in earnings. When a derivative instrument is designated as a cash flow hedge of a forecasted transaction that becomes probable of not occurring, the gain or loss on the derivative is immediately reclassified into earnings from AOCI. See Note 5 for further discussion on derivatives and hedging.

Credit Risk

N. Credit Risk

The Rocky Mountain region is the Company's primary market area. Exposure to credit risk may be affected by the concentration of customers in this region due to changes in economic or other conditions. Customers include individuals and numerous commercial and industrial enterprises that may react differently to changing conditions. Management believes that its credit-review procedures, loss reserves, customer deposits and collection procedures have adequately provided for usual and customary credit-related losses. Loss reserves are periodically reviewed for adequacy and may be established on a specific-case basis.

Bad debt expense associated with accounts receivable amounted to $2.4 million in 2011, $0.5 million in 2010 and $3.4 million in 2009. The 2010 bad-debt expense was reduced by $1.5 million from the settlement of a revenue dispute that had been previously accrued for in the allowance for bad debts. The allowance for bad-debt expenses was $3.2 million at December 31, 2011 and 2010. Questar Gas's retail-gas operations account for a majority of the bad-debt expense. Questar Gas estimates bad-debt expense as a percentage of general-service revenues with periodic adjustments. Uncollected accounts are generally written off six months after gas is delivered and interest is no longer accrued. Questar Gas recovers bad debt costs related to the gas-cost portion of rates in its Utah operations through a purchased-gas adjustment to rates.

Asset Retirement Obligations

O. Asset Retirement Obligations

Questar records an asset retirement obligation (ARO) when there is a legal obligation associated with the retirement of a tangible long-lived asset. The Company has not capitalized future abandonment costs on a majority of its long-lived transportation and distribution assets because the Company does not have a legal obligation to restore the area surrounding abandoned assets. In these cases, the regulatory agencies have opted to leave retired facilities in the ground undisturbed rather than requiring the Company to excavate and dispose of the assets. Cost-of-service AROs apply primarily to abandonment costs associated with gas and oil wells and certain other properties. If recording an ARO is warranted, the fair value of retirement costs is estimated by Company personnel based on abandonment costs of similar properties available to field operations and depreciated over the life of the related assets. Revisions to ARO estimates result from changes in expected cash flows or material changes in estimated retirement costs. Income or expense resulting from the settlement of ARO liabilities is included in net gain (loss) from asset sales on the Consolidated Statements of Income. The ARO liability is adjusted to present value each period through an accretion calculation using a credit-adjusted risk-free interest rate. See Note 3 for further discussion on AROs.

Income Taxes

P. Income Taxes

Questar and its subsidiaries file a consolidated federal income tax return. Questar Pipeline and Questar Gas account for income tax expense on a separate return basis and record tax benefits as they are generated. Deferred income taxes are provided for the temporary differences arising between the book and tax-carrying amounts of assets and liabilities. These differences create taxable or tax-deductible amounts for future periods. Questar Gas and Questar Pipeline use the deferral method to account for investment tax credits as required by regulatory commissions. The Company records interest earned on income tax refunds in interest and other income and records penalties and interest charged on tax deficiencies in interest expense.

Accounting standards for income taxes specify the accounting for uncertainty in income taxes by prescribing a minimum recognition threshold for a tax position to be reflected in the financial statements. If recognized, the tax benefit is measured as the largest amount of tax benefit that is more-likely-than-not to be realized upon ultimate settlement. Management has considered the amounts and the probabilities of the outcomes that could be realized upon ultimate settlement and believes that it is more-likely-than-not that the Company's recorded income tax benefits will be fully realized. There were no unrecognized tax benefits at the beginning or at the end of the years ended December 31, 2011, 2010 and 2009. The federal income tax return for 2009 is currently under examination by the Internal Revenue Service. The 2010 federal income tax return was filed in September, 2011 and may be examined by the Internal Revenue Service. The 2011 federal tax return has not been filed and may also be examined by the Internal Revenue Service.

Under current federal tax statues, taxpayers are allowed to deduct on their 2011 federal tax return 100% of their capital expenditures during 2011. The effects of 100% bonus depreciation and other significant book/tax differences will cause Questar to incur a net operating loss (NOL) for federal income tax purposes for the tax year ending 2011. The estimated NOL for 2011 is $102.0 million, which will expire in 2031. It is anticipated that Questar will be able to utilize the NOL by offsetting it against future taxable income. See Note 7 for further discussion on income taxes.

Earnings Per Share

Q. Earnings Per Share

Basic earnings per share (EPS) is computed by dividing net income attributable to Questar by the weighted-average number of common shares outstanding during the reporting period. Diluted EPS includes the potential increase in the number of outstanding shares that could result from the exercise of in-the-money stock options, the vesting of restricted stock units and performance shares that are part of the Company's Long-Term Incentive Plan (LTSIP), less shares repurchased under the treasury stock method. See Note 2 for further discussion on EPS.

Share-Based Compensation

R. Share-Based Compensation

Questar issues stock options, restricted shares, restricted stock units and performance shares to certain officers, employees and non-employee directors under its LTSIP. The Company uses the Black-Scholes-Merton mathematical model in estimating the fair value of stock options, and the Monte Carlo simulation method in estimating the fair value of performance shares for accounting purposes. The granting of restricted shares and restricted stock units results in recognition of compensation cost measured at the grant-date market price. Questar uses an accelerated method in recognizing share-based compensation costs with graded-vesting periods. See Note 11 for further discussion on share-based compensation.

Comprehensive Income - Questar

S. Comprehensive Income

Comprehensive income attributable to Questar is the sum of net income attributable to Questar as reported in the Consolidated Statements of Income and other comprehensive income (loss) (OCI) as reported in the Consolidated Statements of Equity. OCI includes recognition of the under-funded position of pension and other postretirement benefit plans, changes in the fair value of long-term investment, interest rate cash flow hedges and commodity-based derivative instruments, and income taxes. These transactions are not the culmination of the earnings process but result from periodically adjusting historical balances to fair value. Income or loss is recognized when the pension or other postretirement benefit costs are accrued, when the long-term investment is sold or otherwise realized, as the Company records interest expense for hedged interest payments and when gas, oil or NGL underlying the derivative instrument is sold.

Comprehensive Income - Questar Pipeline

Comprehensive income for Questar Pipeline is the sum of net income as reported in the Questar Pipeline Consolidated Statements of Income and OCI as reported in the Questar Pipeline Consolidated Statements of Equity. OCI includes interest rate cash flow hedges and income taxes. These transactions are not the culmination of the earnings process but result from periodically adjusting historical balances to fair value. Income or loss is recognized as the company records interest expense for hedged interest payments.

Business Segments

T. Business Segments

Line of business information is presented according to senior management's basis for evaluating performance considering differences in the nature of products, services and regulation, among other factors. Certain intersegment sales include intercompany profit.

Recent Accounting Developments

U. Recent Accounting Developments

In May 2011, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2011-04, Fair Value Measurement (Topic 820): Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and International Financial Reporting Standards (IFRSs) to provide a consistent definition of fair value and ensure that fair value measurements and disclosure requirements are similar between U.S. GAAP and IFRSs. This guidance changes certain fair value measurement principles and enhances the disclosure requirements for fair value measurements. The amendments in this ASU are effective for interim and annual periods beginning after December 15, 2011 and are applied prospectively. Early adoption by public entities is not permitted. The Company does not expect adoption of ASU 2011-04 will have a material impact on the Company's financial position, results of operations or cash flows.

In June of 2011, the FASB issued ASU 2011-05, Comprehensive Income (Topic 220) Presentation of Comprehensive Income which requires comprehensive income to be presented as either a continuous statement of comprehensive income or two separate but consecutive statements. However, the amendments do not change the items that must be reported in other comprehensive income. The amendments in this ASU are effective for interim and fiscal year periods beginning after December 15, 2011 and are to be applied retrospectively. The adoption of these standards will not impact the Company's financial results or disclosures but will have an impact on the presentation of comprehensive income when adopted.

Reclassifications

V. Reclassifications

Certain reclassifications were made to prior-year financial statements to conform to the 2011 presentation.