1.0.0.3 false Fair Value Measures false 1 $ false false u000 Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 u001 Standard http://www.xbrl.org/2003/instance shares xbrli 0 u002 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 2 0 str_NotesToFinancialStatementsAbstract str false na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false No definition available. false 3 1 us-gaap_FairValueDisclosuresTextBlock us-gaap true na duration string No definition available. false false false false false false false false false 1 false false 0 0 Note 6 - Fair-Value Measures Beginning in 2008, Questar adopted the effective provisions of ASC 820 "Fair-Value Measurements" (formerly SFAS 157.) ASC 820 defines fair value in applying GAAP, establishes a framework for measuring fair value and expands disclosures about fair-value measurements. ASC 820 does not change existing guidance as to whether or not an instrument is carried at fair value. ASC 820 establishes a fair-value hierarchy. Level 1 inputs are quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date. Level 2 inputs are inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability. The Level 2 fair value of derivative contracts is located in Note 7 and is based on market prices posted on the NYMEX on the last trading day of the reporting period. In February 2008, the FASB delayed the effective date of ASC 820 for one year for certain nonfinancial assets and nonfinancial liabilities, except those recognized or disclosed at fair value in the financial statements on a recurring basis. On January 1, 2009, Questar adopted, without material impact on the consolidated financial statements, the delayed provisions of ASC 820 related to nonfinancial assets and nonfinancial liabilities that are not required or permitted to be measured at fair value on a recurring basis, which includes, among other things, asset retirement obligations. The valuation of asset retirement obligations is a Level 3 fair value and is discussed in Note 8. In April 2009, the FASB issued guidance requiring disclosures about fair value of financial instruments for interim periods as well as in annual financial statements. The new disclosure rules are effective for interim reporting periods ending after June 15, 2009. The following table discloses the fair value and related carrying amount of certain financial instruments not disclosed in other notes to the consolidated financial statements in this quarterly report on Form 10-Q: Carrying Estimated Carrying Estimated Amount Fair Value Amount Fair Value Sept. 30, 2009 Dec. 31, 2008 (in millions)Financial assets Cash and cash equivalents $ 23.9 $ 23.9 Financial liabilities Checks outstanding in excess of cash balances $ 14.1 $ 14.1 Short-term debt 38.5 38.5 231.1 231.1 Long-term debt 2,147.2 2,276.4 2,122.2 1,994.8 Cash and cash equivalents, checks outstanding in excess of cash balances and short-term debt - the carrying amount approximates fair value. Long-term debt - the carrying amount of variable-rate debt approximates fair value. The fair value of fixed-rate debt is based on the discounted present value of cash flows using the Company's current borrowing rates. Note 6 - Fair-Value Measures Beginning in 2008, Questar adopted the effective provisions of ASC 820 "Fair-Value Measurements" (formerly SFAS 157.) ASC 820 false false No definition available. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true