XML 17 R33.htm IDEA: XBRL DOCUMENT v2.4.0.6
Debt (Tables)
 6 Months Ended
Jun. 30, 2012
Debt  
Carrying values of the senior notes

 

 

 

 

June 30, 2012

 

December 31, 2011

 

2.450% senior notes due 2015

 

$ 

523,660

 

 $

527,191

 

 

 

 

 

 

 

 

 

3.950% senior notes due 2020

 

 

498,909

 

 

498,854

 

 

 

 

 

 

 

 

 

5.700% senior notes due 2040

 

 

249,543

 

 

249,540

 

Total long-term debt

 

$ 

1,272,112

 

 $

1,275,585