Income Taxes	3 Months Ended
Jun. 30, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes As of June 30, 2014, we had $582 million of unrecognized tax benefits, of which $427 million would reduce income tax expense and the effective tax rate, if recognized. During the next twelve months, it is reasonably possible that audit resolutions and the expiration of statutes of limitations could potentially reduce our unrecognized tax benefits by up to $158 million. However, this amount may change as we continue to have ongoing negotiations with various taxing authorities throughout the year. We have received reassessments from the Canada Revenue Agency (“CRA”) for a total of $261 million related to a transfer pricing matter impacting years 2003 through 2010. On December 13, 2013, the Tax Court of Canada dismissed our appeal of the 2003 reassessment and we have filed a Notice of Appeal to the Federal Court of Appeal regarding this tax year. During the first quarter of 2015, we filed a Notice of Appeal with the Tax Court of Canada relating to the 2004 through 2008 reassessments. The ultimate resolution of these issues could result in an increase or decrease to income tax expense. Through the appeals process, we reached an agreement with the Internal Revenue Service (“IRS”) to settle all outstanding issues relating to years 2003 through 2006. As a result of this agreement we will pay additional taxes of $21 million, which have already been accrued in our financial statements. We are also recognizing a $17 million discrete tax benefit during the quarter to record a previously unrecognized tax benefit. The IRS is currently examining our U.S. corporation income tax returns for 2007 through 2009. The CRA is currently examining our Canadian Income tax returns for 2011 through 2013. In nearly all jurisdictions, the tax years prior to 2003 are no longer subject to examination. We report interest and penalties on tax deficiencies as income tax expense. During the quarter, we recognized income tax expense of $4 million, before any tax benefit, related to interest and penalties in our condensed consolidated statements of operations. At June 30, 2014, before any tax benefits, our accrued interest and penalties on unrecognized tax benefits amounted to $161 million.

Income Taxes

3 Months Ended

Jun. 30, 2014

As of June 30, 2014, we had $582 million of unrecognized tax benefits, of which $427 million would reduce income tax expense and the effective tax rate, if recognized. During the next twelve months, it is reasonably possible that audit resolutions and the expiration of statutes of limitations could potentially reduce our unrecognized tax benefits by up to $158 million. However, this amount may change as we continue to have ongoing negotiations with various taxing authorities throughout the year.

We have received reassessments from the Canada Revenue Agency (“CRA”) for a total of $261 million related to a transfer pricing matter impacting years 2003 through 2010. On December 13, 2013, the Tax Court of Canada dismissed our appeal of the 2003 reassessment and we have filed a Notice of Appeal to the Federal Court of Appeal regarding this tax year. During the first quarter of 2015, we filed a Notice of Appeal with the Tax Court of Canada relating to the 2004 through 2008 reassessments. The ultimate resolution of these issues could result in an increase or decrease to income tax expense.

Through the appeals process, we reached an agreement with the Internal Revenue Service (“IRS”) to settle all outstanding issues relating to years 2003 through 2006. As a result of this agreement we will pay additional taxes of $21 million, which have already been accrued in our financial statements. We are also recognizing a $17 million discrete tax benefit during the quarter to record a previously unrecognized tax benefit.

The IRS is currently examining our U.S. corporation income tax returns for 2007 through 2009. The CRA is currently examining our Canadian Income tax returns for 2011 through 2013. In nearly all jurisdictions, the tax years prior to 2003 are no longer subject to examination.

We report interest and penalties on tax deficiencies as income tax expense. During the quarter, we recognized income tax expense of $4 million, before any tax benefit, related to interest and penalties in our condensed consolidated statements of operations. At June 30, 2014, before any tax benefits, our accrued interest and penalties on unrecognized tax benefits amounted to $161 million.