text: long-term debt. We attempt to limit our exposure to interest rate risk by managing 
  the mix of our long-term fixed rate borrowings and short-term borrowings under 
  our bank credit facilities. 
  
  In 2003, we entered into three interest rate swap agreements, designated as fair 
  value hedges, which effectively converted $400 million of our fixed rate debt to 
  floating rate debt. In 2004, we terminated interest rate swap agreements with total 
  notional amounts of $400 million and entered into additional interest rate swap 
  agreements designated as fair value hedges with total notional amounts of 
  $100 million, leaving interest rate swap agreements with total notional amounts 
  of $100 million at December 31, 2004. 
  
  Under the terms of these agreements, we make payments based on specified spreads 
  over six-month LIBOR, and receive payments equal to the interest payments due 
  on the fixed rate debt. The interest rate swap agreements qualify for the “shortcut 
  method” allowed under SFAS No. 133, which allows an assumption of no 
  ineffectiveness in the hedging relationship. As such, there is no income statement 
  impact from changes in the fair value of the hedging instruments. 