Nature of Business (Notes)
 3 Months Ended
Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Nature of Business
Note 1 - Nature of Business

Questar Corporation is a Rockies-based integrated natural gas company with three principal complementary and wholly-owned lines of business:

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Questar Gas Company (Questar Gas) provides retail natural gas distribution in Utah, Wyoming and Idaho.
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Wexpro Company (Wexpro) develops and produces natural gas from cost-of-service reserves for Questar Gas customers.
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Questar Pipeline Company (Questar Pipeline) operates interstate natural gas pipelines and storage facilities in the western United States and provides other energy services.

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