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Debt Obligations Regency Senior Notes (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Senior Notes 9 Point 375 Percent Due June 1 2016 [Member]
   
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]    
Redemption of Senior Notes   35.00%
Early Repayment of Senior Debt   $ 87,500,000
Offering Price for Debt Redemption Percentage 109.375%  
Issuance of Debt [Member]
   
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]    
Senior Notes 700,000,000 $ 700,000,000
Debt Instrument, Interest Rate, Stated Percentage 5.50% 5.50%