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Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2012
Commitments and Contingencies [Abstract]  
Guarantees and Bond Indemnities Issued and Outstanding
The following table presents guarantees and bond indemnities issued and outstanding for Xcel Energy Inc.:

(Millions of Dollars)
 
June 30, 2012
  
Dec. 31, 2011
 
Guarantees issued and outstanding
 $68.4  $67.5 
Current exposure under these guarantees
  17.9   18.0 
Bonds with indemnity protection
  30.0   31.2