Earnings Per Share (Notes)

9 Months Ended

Sep. 30, 2015

Basic earnings per share (EPS) is computed by dividing net income by the weighted-average number of common shares outstanding during the reporting period, which includes vested undistributed restricted stock units (RSUs) and vested undistributed deferred RSUs. 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 RSUs with forfeitable dividend equivalents and the distribution of performance shares that are part of the Company's Long-Term Stock Incentive Plan (LTSIP), less shares repurchased under the treasury stock method. Restricted shares and RSUs with nonforfeitable dividends or dividend equivalents are participating securities for the computation of basic EPS under the two-class method. The application of the two-class method has an insignificant impact on the calculation of Questar's basic and diluted EPS. A reconciliation of the components of basic and diluted shares used in the EPS calculation follows:



	3 Months Ended		9 Months Ended		12 Months Ended
	September 30,		September 30,		September 30,
	2015	2014	2015	2014	2015	2014
	(in millions)
Weighted-average basic common shares outstanding	176.2	175.8	176.3	175.8	176.2	175.7
Potential number of shares issuable under the Company's LTSIP	0.1	0.3	0.2	0.3	0.2	0.3
Weighted-average diluted common shares outstanding	176.3	176.1	176.5	176.1	176.4	176.0