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INCOME TAXES	6 Months Ended
INCOME TAXES	Jun. 30, 2013
INCOME TAXES
INCOME TAXES	12. INCOME TAXES The effective income tax rates for the three and six months ended June 30, 2013 were 24.6% and 24.8%, respectively (2012 - recovery of 31.0% and expense of 2.5%, respectively). In 2012, the effective rate reflected significant losses relating to certain risk management activities in the Company’s United States operations and the higher United States income tax rate over the Canadian federal statutory rate. The losses did not persist in the three or six months ended June 30, 2013. The gross change for current year uncertain tax positions included an increase of $8 million with respect to Texas Gross Margin Tax and a decrease of $18 million recognizing the tax benefit pertaining to changes for tax on preferred share dividends which became enacted law during the second quarter of 2013.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

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