Basic
Diluted
Used in basic calculation
Used in diluted calculation
Dividends per common share
ASSETS
Current Assets
Cash and cash equivalents
Ending cash and cash equivalents
Beginning cash and cash equivalents
Accounts receivable, net
Unbilled-gas accounts receivable
Fair value of derivative contracts
Derivative Assets Current
Gas and oil storage
Materials and supplies
Prepaid expenses and other
Total Current Assets
Total Current Assets
Property, Plant and Equipment (successful efforts method for gas and oil properties)
Accumulated depreciation, depletion and amortization
Accumulated depreciation, depletion and amortization
Net Property, Plant and Equipment
Net Property, Plant and Equipment
Investment in unconsolidated affiliates
Goodwill
Regulatory assets
Fair value of derivative contracts
Derivative Assets Noncurrent
Other noncurrent assets, net
Total Assets
Total Assets
Statement [Table]
Statement [Line Items]
Statement of Financial Position [Abstract]
LIABILITIES AND EQUITY
Current Liabilities
Checks outstanding in excess of cash balances
Short-term debt
Accounts payable and accrued expenses
Fair value of derivative contracts
Derivative Liabilities Current
Purchase-gas adjustment
Deferred income taxes - current
Current portion of long-term debt
Total Current Liabilities
Total Current Liabilities
Long-term debt, less current portion
Deferred income taxes
Deferred Tax Liabilities Noncurrent
Asset retirement obligations
Pension and postretirement benefits
Fair value of derivative contracts
Derivative Liabilities Noncurrent
Other long-term liabilities
EQUITY
Common stock
Retained earnings
Accumulated other comprehensive income
Total Common Shareholders' Equity
Total Common Shareholders' Equity
Noncontrolling interest
Total Equity
Total Equity
Total Liabilities and Equity
Total Liabilities and Equity
Income Statement [Abstract]
REVENUES
Market Resources
Questar Pipeline
Questar Gas
Total Revenues
Total Revenues
OPERATING EXPENSES
Cost of natural gas and other products sold (excluding operating expenses shown separately)
Operating and maintenance
General and administrative
Production and other taxes
Depreciation, depletion and amortization
Depreciation And Amortization
Exploration
Abandonment and impairment
Total Operating Expenses
Total Operating Expenses
Net gain (loss) from asset sales
Gain Loss On Disposition Of Assets
OPERATING INCOME
OPERATING INCOME
Interest and other income
Income from unconsolidated affiliates
(Income) from unconsolidated affiliates
(Income) from unconsolidated affiliates
Net mark-to-market gain (loss) on basis-only swaps
Net mark-to-market (gain) loss on basis-only swaps
Net mark-to-market (gain) loss on basis-only swaps
Interest expense
Interest expense
INCOME BEFORE INCOME TAXES
INCOME BEFORE INCOME TAXES
Income taxes
Income taxes
Net income
NET INCOME
Net income attributable to noncontrolling interest
Net income attributable to noncontrolling interest
NET INCOME ATTRIBUTABLE TO QUESTAR
NET INCOME ATTRIBUTABLE TO QUESTAR
EARNINGS PER COMMON SHARE ATTRIBUTABLE TO QUESTAR
Statement of Cash Flows [Abstract]
OPERATING ACTIVITIES
Adjustments to reconcile net income to net cash provided from operating activities
Depreciation, depletion and amortization
Depreciation Depletion And Amortization
Deferred income taxes
Deferred Income Tax Expense Benefit
Share-based compensation
Net (gain) from asset sales
Gain Loss On Sale Of Property Plant Equipment
Distributions from unconsolidated affiliates and other
Changes in operating assets and liabilities
NET CASH PROVIDED FROM OPERATING ACTIVITIES
NET CASH PROVIDED FROM OPERATING ACTIVITIES
INVESTING ACTIVITIES
Capital expenditures
Property, plant and equipment
Other investments
Total capital expenditures
Total capital expenditures
Total capital expenditures
Cash used in disposition of assets
Cash used in disposition of assets
Proceeds from disposition of assets
NET CASH USED IN INVESTING ACTIVITIES
NET CASH USED IN INVESTING ACTIVITIES
FINANCING ACTIVITIES
Common stock issued
Common stock repurchased
Common stock repurchased
Long-term debt issued, net of issuance costs
Long-term debt repaid
Long-term debt repaid
Change in short-term debt
Checks outstanding in excess of cash balance
Checks outstanding in excess of cash balances
Dividends paid
Dividends paid
Excess tax benefits from share-based compensation
Distribution to noncontrolling interest
Distribution to noncontrolling interest
Other
NET CASH PROVIDED FROM (USED IN) FINANCING ACTIVITIES
NET CASH PROVIDED FROM (USED IN) FINANCING ACTIVITIES
Change in cash and cash equivalents
Change in cash and cash equivalents
Nature of Business
Nature of Operations
Nature of Operations [Text Block]
Basis of Presentation of Interim Consolidated Financial Statements
Basis of Presentation of Interim Consolidated Financial Statements
Basis of Presentation of Interim Consolidated Financial Statements [Text Block]
Earnings Per Share (EPS)
Earnings Per Share (EPS)
Earnings Per Share (EPS) [Text Block]
Share-Based Compensation
Share-Based Compensation [Text Block]
Fair-Value Measures
Fair-Value Measures
Fair-Value Measures [Text Block]
Derivative Contracts
Derivative Contracts
Derivative Contracts [Text Block]
Asset Retirement Obligations (ARO)
Asset Retirement Obligations (ARO)
Asset Retirement Obligations (ARO) [Text Block]
Employee Benefits
Employee Benefits [Text Block]
Employee Benefits
Change in Ownership Interest
Change in Ownership Interest
Change in Ownership Interest [Text Block]
Capitalized Exploratory Well Costs
Capitalized Exploratory Well Costs [Text Block]
Operations by Line of Business
Operations by Line of Business
Operations by Line of Business [Text Block]
Comprehensive Income [Text Block]
Comprehensive Income
Recent Accounting Developments
Recent Accounting Developments
Recent Accounting Developments [Text Block]
Weighted Average Number Of Common Shares Outstanding
Dry exploratory well expense
Dry exploratory well expense
Share-Based Compensation
Capitalized Exploratory Well Costs
Comprehensive Income