Income Taxes	9 Months Ended
Sep. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes We operate on a global basis and are subject to numerous and complex tax laws and regulations. Our income tax filings are regularly under audit in multiple federal, state and foreign jurisdictions. Income tax audits may require an extended period of time to reach resolution and may result in significant income tax adjustments when interpretation of tax laws or allocation of company profits is disputed. The net amount of tax liability for unrecognized tax benefits may change within the next twelve months due to changes in audit status, expiration of statutes of limitations, settlements of tax assessments and other events which could impact our determination of unrecognized tax benefits. Currently, we cannot reasonably estimate the amount by which our unrecognized tax benefits will change. During the second quarter of 2014, the Internal Revenue Service (“IRS”) began the audit of our U.S. federal returns for the years 2010 through 2012. During the second quarter of 2011, the IRS concluded its examination of our U.S. federal returns for years 2005 through 2007, and during the fourth quarter of 2013, the IRS concluded its examination of our U.S. federal returns for years 2008 through 2009. For years 2006 through 2009, the IRS has proposed adjustments reallocating profits between certain of our U.S. and foreign subsidiaries. During the second quarter of 2014, the IRS issued a corrected Revenue Agent Report for years 2008 through 2009, assessing a penalty with respect to a 2008 uncertain tax position. We have disputed these proposed adjustments and continue to pursue resolution with the IRS. During the second quarter of 2014, the IRS issued a statutory notice of deficiency for the years 2005 through 2007. We are contesting this deficiency notice and we filed a petition with the U.S. Tax Court during the third quarter of 2014. Although the ultimate timing for resolution of the disputed tax issues is uncertain, we may resolve certain tax matters with the IRS within the next twelve months and pay amounts for other unresolved tax matters in order to limit the potential impact of IRS interest charges. Final resolution of these matters could have a material impact on our income tax expense, results of operations and cash flows for future periods. In the three and nine month periods ended September 30, 2015, our effective tax rate was 30.2 percent and 2.7 percent, respectively. Our effective tax rate was lower than the U.S. statutory income tax rate of 35.0 percent primarily due to income earned in foreign locations with lower tax rates as well as the majority of “Special items” expense has been incurred in higher tax jurisdictions.

13. Income Taxes

We operate on a global basis and are subject to numerous and complex tax laws and regulations. Our income tax filings are regularly under audit in multiple federal, state and foreign jurisdictions. Income tax audits may require an extended period of time to reach resolution and may result in significant income tax adjustments when interpretation of tax laws or allocation of company profits is disputed. The net amount of tax liability for unrecognized tax benefits may change within the next twelve months due to changes in audit status, expiration of statutes of limitations, settlements of tax assessments and other events which could impact our determination of unrecognized tax benefits. Currently, we cannot reasonably estimate the amount by which our unrecognized tax benefits will change.

During the second quarter of 2014, the Internal Revenue Service (“IRS”) began the audit of our U.S. federal returns for the years 2010 through 2012. During the second quarter of 2011, the IRS concluded its examination of our U.S. federal returns for years 2005 through 2007, and during the fourth quarter of 2013, the IRS concluded its examination of our U.S. federal returns for years 2008 through 2009. For years 2006 through 2009, the IRS has proposed adjustments reallocating profits between certain of our U.S. and foreign subsidiaries. During the second quarter of 2014, the IRS issued a corrected Revenue Agent Report for years 2008 through 2009, assessing a penalty with respect to a 2008 uncertain tax position. We have disputed these proposed adjustments and continue to pursue resolution with the IRS. During the second quarter of 2014, the IRS issued a statutory notice of deficiency for the years 2005 through 2007. We are contesting this deficiency notice and we filed a petition with the U.S. Tax Court during the third quarter of 2014. Although the ultimate timing for resolution of the disputed tax issues is uncertain, we may resolve certain tax matters with the IRS within the next twelve months and pay amounts for other unresolved tax matters in order to limit the potential impact of IRS interest charges. Final resolution of these matters could have a material impact on our income tax expense, results of operations and cash flows for future periods.

In the three and nine month periods ended September 30, 2015, our effective tax rate was 30.2 percent and 2.7 percent, respectively. Our effective tax rate was lower than the U.S. statutory income tax rate of 35.0 percent primarily due to income earned in foreign locations with lower tax rates as well as the majority of “Special items” expense has been incurred in higher tax jurisdictions.