Income Taxes	3 Months Ended
Mar. 31, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Note 14. Income Taxes The total amount of unrecognized tax benefits as of March 31, 2013, was $164 million, of which $57 million would affect our effective tax rate if recognized. It is reasonably possible that approximately $16 million of our unrecognized tax benefits as of March 31, 2013 will reverse within the next twelve months. We recognize interest and penalties related to unrecognized tax benefits through income tax expense. As of March 31, 2013, we had $13 million accrued for the payment of interest and less than $1 million accrued for the payment of penalties. During the three months ended March 31, 2013, we recorded a tax benefit of $70 million in discontinued operations, net as a result of the reversal of tax and interest reserves associated with an uncertain tax position, which was related to a previous disposition. The applicable statute of limitation for this tax position lapsed during the first quarter of 2013. We are subject to taxation in the U.S. federal jurisdiction, as well as various state and foreign jurisdictions. As of March 31, 2013, we are no longer subject to examination by U.S. federal taxing authorities for years prior to 2007 or to examination by any U.S. state taxing authority prior to 2002. All subsequent periods remain eligible for examination, and we are currently under audit by the Internal Revenue Service for years 2007 through 2009. In the significant foreign jurisdictions in which we operate, we are no longer subject to examination by the relevant taxing authorities for any years prior to 2001.

Income Taxes

3 Months Ended

Mar. 31, 2013

Note 14. Income Taxes

The total amount of unrecognized tax benefits as of March 31, 2013, was $164 million, of which $57 million would affect our effective tax rate if recognized. It is reasonably possible that approximately $16 million of our unrecognized tax benefits as of March 31, 2013 will reverse within the next twelve months.

We recognize interest and penalties related to unrecognized tax benefits through income tax expense. As of March 31, 2013, we had $13 million accrued for the payment of interest and less than $1 million accrued for the payment of penalties.

During the three months ended March 31, 2013, we recorded a tax benefit of $70 million in discontinued operations, net as a result of the reversal of tax and interest reserves associated with an uncertain tax position, which was related to a previous disposition. The applicable statute of limitation for this tax position lapsed during the first quarter of 2013.

We are subject to taxation in the U.S. federal jurisdiction, as well as various state and foreign jurisdictions. As of March 31, 2013, we are no longer subject to examination by U.S. federal taxing authorities for years prior to 2007 or to examination by any U.S. state taxing authority prior to 2002. All subsequent periods remain eligible for examination, and we are currently under audit by the Internal Revenue Service for years 2007 through 2009. In the significant foreign jurisdictions in which we operate, we are no longer subject to examination by the relevant taxing authorities for any years prior to 2001.