text: In December 2002, we settled the IRS audit of the Company’s 1995 and 1996 tax 
  returns, which did not result in a material impact on our results of operations or 
  financial position. During 2003, we filed amended returns for tax years subsequent 
  to 1996 to reflect the impact of the IRS audits of the 1993 through 1996 tax years 
  on those subsequent years. In the fourth quarter of 2003, the statutes of limitations 
  expired for the 1997 through 1999 tax years, resulting in a reduction of our tax 
  reserves of $13 million and a corresponding reduction in our provision for income 
  taxes. In the third quarter of 2004, the statute of limitations expired for our 2000 
  tax return, resulting in a reduction of our tax reserves of $6 million and a corre- 
  sponding reduction in our provision for income taxes. Subsequent to December 31, 
  2004, we received notice that the IRS will audit our 2001 and 2002 tax returns, 
  and the tax returns for years after 2002 are subject to possible future examination. 
  
  We classify reserves for tax uncertainties within “other accrued liabilities” in the 
  accompanying consolidated balance sheets, separate from any related income tax 
  payable or deferred income taxes. Reserve amounts may relate to the deductibility 
  of an item, as well as potential interest associated with those items. 