2.2.0.25falsefalse10501 - Disclosure - Investmentstruefalsefalse1falsefalseUSDfalsefalse1/1/2011 - 3/31/2011 USD ($) USD ($) / shares $Duration_1_1_2011_To_3_31_2011http://www.sec.gov/CIK0001037949duration2011-01-01T00:00:002011-03-31T00:00:00Unit12Standardhttp://www.xbrl.org/2003/iso4217USDiso42170Unit1Standardhttp://www.xbrl.org/2003/instancesharesxbrli0Unit15Dividehttp://www.xbrl.org/2003/iso4217USDiso4217http://www.xbrl.org/2003/instancesharesxbrli0Unit14Standardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$2true0us-gaap_InvestmentsAbstractus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNo definition available.falsefalseInvestments3false0us-gaap_InvestmentsInDebtAndMarketableEquitySecuritiesAndCertainTradingAssetsDisclosureTextBlockus-gaaptruenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1falsefalsefalse00<div> <div> (5) Investments As of March 31, 2011, our investments included auction rate securities, which were classified as noncurrent, available-for-sale investments at their estimated fair value on our consolidated balance sheets. We recorded an immaterial amount of unrealized gains and losses on these auction rate securities for the three months ended March 31, 2011 and 2010, respectively. Our auction rate securities were transferred to CenturyLink in April 2011. The following table summarizes our balance of these auction rate securities, the cumulative net unrealized loss, net of deferred income taxes, related to these securities and the cost basis of these securities as of March 31, 2011 and December 31, 2010:   <table border="0" cellspacing="0" cellpadding="0" width="100%" align="center"> <tr><td width="68%"> </td> <td valign="bottom" width="13%"> </td> <td> </td> <td> </td> <td> </td> <td valign="bottom" width="13%"> </td> <td> </td> <td> </td> <td> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">March 31, 2011</td> <td valign="bottom"> </td> <td valign="bottom">  </td> <td style="border-bottom: #000000 1px solid;" valign="bottom" colspan="2" align="center">December 31, 2010</td> <td valign="bottom"> </td></tr> <tr><td valign="bottom"> </td> <td valign="bottom">  </td> <td valign="bottom" colspan="6" align="center">(Dollars in millions)</td> <td valign="bottom"> </td></tr> <tr bgcolor="#bcddf7"><td height="8"> </td> <td height="8" colspan="4"> </td> <td height="8" colspan="4"> </td></tr> <tr bgcolor="#bcddf7"><td valign="top"> Auction rate securities – fair value</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">92</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">92</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr><td valign="top"> Classification</td> <td valign="bottom">  </td> <td valign="bottom" align="center">   </td> <td valign="bottom" colspan="5" align="center">Noncurrent, available-for-sale investments</td> <td valign="bottom">     </td></tr> <tr bgcolor="#bcddf7"><td valign="top"> Balance sheet location (reported at estimated fair value)</td> <td valign="bottom">  </td> <td valign="bottom" align="center"> </td> <td valign="bottom" colspan="5" align="center">Other noncurrent assets</td> <td valign="bottom">  </td></tr> <tr><td valign="top"> Cumulative net unrealized loss, net of deferred income taxes</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">16</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">16</td> <td valign="bottom" nowrap="nowrap">  </td></tr> <tr bgcolor="#bcddf7"><td valign="top"> Auction rate securities – cost basis</td> <td valign="bottom">  </td> <td valign="bottom">$</td> <td valign="bottom" align="right">120</td> <td valign="bottom" nowrap="nowrap">  </td> <td valign="bottom">  </td> <td valign="bottom"> </td> <td valign="bottom" align="right">120</td> <td valign="bottom" nowrap="nowrap">  </td></tr></table> These unrealized losses were recorded in accumulated other comprehensive loss on our consolidated balance sheets. We considered the decline in fair value to be a temporary impairment because we believed it was more likely than not that we would ultimately recover the entire $120 million cost basis, in part because the securities were rated investment grade, the securities were collateralized, we intended to and had the ability to hold the securities until they recovered and the issuers continued to make required interest payments. Prior to August 2007, we invested in these securities for short periods of time as part of our cash management program. However, the state of the credit markets had prevented us and other investors from liquidating holdings of these securities in auctions since the third quarter of 2007. These auction rate securities have stated maturities between 2033 and 2036. </div> </div>(5) Investments As of March 31, 2011, our investments included auction rate securities, which were classified as noncurrent, available-for-salefalsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis item represents the entire disclosure related to Investments in Certain Debt and Equity Securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 3, 19, 20, 21, 22, 137 falsefalseInvestments12InvestmentsUnKnownUnKnownUnKnownUnKnownfalsetrue