v2.4.0.6
Document And Entity Information
6 Months Ended
Jun. 30, 2013
Document Information [Abstract]  
Document Type 10-Q
Amendment Flag false
Entity Registrant Name Southern Union Co
Entity Central Index Key 0000203248
Document Period End Date Jun. 30, 2013
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2013
Document Fiscal Period Focus Q2
Entity Filer Category Non-accelerated Filer
Entity Common Stock, Shares Outstanding 0