1.0.0.3 false Equity false 1 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 2 Equity [Abstract] 0 us-gaap_EquityAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false No definition available. false 3 Equity 1 lll_EquityNoteDisclosureTextBlock lll false na duration string Disclosures include the authorization and status of L-3 Holdings share repurchase program, the remaining dollar value of the... false false false false false false false false false 1 false false 0 0   <div style="margin-left: 0%"> <div style="margin-top: 9pt; font-size: 1pt">  </div> <table width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; font-family: Arial, Helvetica; color: #000000; background: #ffffff; text-align: left"> <tr> <td width="5%"></td> <td width="95%"></td> </tr> <tr valign="top"> <td> <b><font style="font-family: 'Times New Roman', Times">11.  </font></b> </td> <td> <b><font style="font-family: 'Times New Roman', Times">Equity</font></b> </td> </tr> </table> <div style="margin-top: 9pt; font-size: 1pt">  </div> <div align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: #ffffff"> In October 2008, L-3 Holdings completed its previously announced $750 million share repurchase program, which was approved by its Board of Directors on December 11, 2007. On November 24, 2008, L-3 Holdings’ Board of Directors approved a new share repurchase program that authorizes L-3 Holdings to repurchase up to an additional $1 billion of its outstanding shares of common stock through December 31, 2010. Repurchases are made from time to time at management’s discretion in accordance with applicable federal securities laws. All share repurchases of L-3 Holdings common stock have been recorded as treasury shares. At December 31, 2009, the remaining dollar value under the share repurchase program was $426 million. </div> <div style="margin-top: 9pt; font-size: 1pt">  </div> <div align="left" style="margin-left: 0%; margin-right: 0%; text-indent: 4%; font-size: 10pt; font-family: 'Times New Roman', Times; color: #000000; background: #ffffff"> From January 1, 2010 through February 25, 2010, L-3 Holdings had repurchased 776,567 shares of its common stock at an average price of $86.81 per share for an aggregate amount of approximately $67 million. </div> </div>  <!-- Begin Block Tagged Note false false Disclosures include the authorization and status of L-3 Holdings share repurchase program, the remaining dollar value of the repurchase program and the shares repurchased subsequent to year end through the date of the 10-K filing. No authoritative reference available. false false 1 2 false UnKnown UnKnown UnKnown false true