XML 76 R80.htm IDEA: XBRL DOCUMENT v2.4.0.6
Commitments and Contingencies (Details 5) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 12 Months Ended
Jun. 30, 2011
Dec. 31, 2011
Texas New Mexico pipeline assets purchased from Link
Dec. 31, 2004
Texas New Mexico pipeline assets purchased from Link
Environmental remediation disclosures      
Environmental reserve recognized     $ 20
Amount of first costs for environmental remediation costs to be born by reporting entity per acquisition agreement     11
Description of first costs for environmental remediation costs to be born by reporting entity per acquisition agreement     we agreed in an arrangement with TNM to bear the first $11 million in costs of pre-May 1999 environmental issues
Amount of environmental remediation costs above which the costs the selling entity agreed to pay all costs     20
Remediation costs incurred since acquisition of a business   22  
Environmental remediation costs borne by the seller of a business acquired by the reporting entity   11  
Insurance      
Premiums and deductibles as a percentage of coverage limit (as a percent) 20.00%    
Number of years over which hurricane limit insurance was purchased 2 years    
Hurricane property and business interruption insurance limit $ 10