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Equity and Distributions (Tables)
6 Months Ended
Jun. 30, 2011
Equity and Distributions [Abstract]  
Summary of Changes in Outstanding Units
 The following table summarizes changes in the number of Holdings' limited partner Units outstanding during the six months ended June 30, 2010.

Balance, January 1, 2010
  139,191,640 
Issuance of Units to directors of the general partner of Holdings
  2,991 
Balance, June 30, 2010
  139,194,631 

The following table summarizes changes in the number of Enterprise's outstanding units since December 31, 2010:

   
Common
 Units
  
Class B
 Units
  
Treasury
Units
 
Balance, December 31, 2010
  843,681,572   4,520,431   -- 
Common units issued in connection with DRIP and EUPP
  1,111,905   --   -- 
Restricted common units issued
  1,359,230   --   -- 
Forfeiture of restricted common units
  (75,857)  --   -- 
Acquisition of treasury units
  (226,601)  --   226,601 
Cancellation of treasury units
  --   --   (226,601)
Other
  (14,301)  --   -- 
Balance, June 30, 2011
  845,835,948   4,520,431   -- 

Net Cash Proceeds from Sale of Common Units
The following table reflects the number of common units issued and the net cash proceeds received from Enterprise's DRIP during the six months ended June 30, 2011:

   
Number of
 Common Units
 Issued
  
Net Cash
Proceeds
 
February 2011 issuance
  474,706  $19.6 
May 2011 issuance
  551,058   21.9 
Total
  1,025,764  $41.5 

Components of Accumulated Other Comprehensive Income (Loss)
The following table presents the components of accumulated other comprehensive income (loss) as reported on our Unaudited Condensed Consolidated Balance Sheets at the dates indicated:

   
June 30,
  
December 31,
 
   
2011
  
2010
 
Commodity derivative instruments (1)
 $(61.2) $(31.8)
Interest rate derivative instruments (1)
  (45.1)  (2.1)
Foreign currency translation adjustment (2)
  1.7   1.7 
Pension and postretirement benefit plans
  (1.0)  (0.4)
Proportionate share of other comprehensive loss of
     Energy Transfer Equity
  (1.7)  (1.0)
Subtotal
  (107.3)  (33.6)
Amounts attributable to noncontrolling interest
  1.1   1.1 
Total accumulated other comprehensive loss in partners' equity
 $(106.2) $(32.5)
          
(1)   See Note 4 for additional information regarding these components of accumulated other comprehensive income (loss).
(2)   Relates to transactions of our Canadian NGL marketing subsidiary.
 

Components of Noncontrolling Interest
The following table presents the components of noncontrolling interest as presented on our Unaudited Condensed Consolidated Balance Sheets at the dates indicated:

   
June 30,
  
December 31,
 
   
2011
  
2010
 
Limited partners of Duncan Energy Partners:
      
     Third-party owners of Duncan Energy Partners (1)
 $407.3  $410.4 
     Related party owners of Duncan Energy Partners (2)
  1.7   1.7 
Joint venture partners (3)
  113.2   115.6 
Accumulated other comprehensive loss
    attributable to noncontrolling interest
  (1.1)  (1.1)
         Total noncontrolling interest
 $521.1  $526.6 
          
(1)   Consists of non-affiliate public unitholders of Duncan Energy Partners.
(2)   Consists of unitholders of Duncan Energy Partners that are related party affiliates.
(3)   Represents third-party ownership interests in joint ventures that we consolidate, including Seminole Pipeline Company, Tri-States NGL Pipeline L.L.C., Independence Hub LLC, Rio Grande Pipeline Company, and Wilprise Pipeline Company LLC.
 

Components of Net Income Attributable to Noncontrolling Interest
The following table presents the components of net income attributable to noncontrolling interest as presented on our Unaudited Condensed Statements of Consolidated Operations for the periods presented:

   
For the Three Months
Ended June 30,
  
For the Six Months
Ended June 30,
 
   
2011
  
2010
  
2011
  
2010
 
Limited partners of Enterprise
 $--  $284.2  $--  $590.7 
Limited partners of Duncan Energy Partners
  9.4   9.6   17.3   18.3 
Joint venture partners
  5.4   6.5   11.3   13.8 
     Total
 $14.8  $300.3  $28.6  $622.8 

Cash Distributions Paid to and Cash Contributions Received From Noncontrolling Interests
The following table presents cash distributions paid to and cash contributions received from noncontrolling interest as presented on our Unaudited Condensed Statements of Consolidated Cash Flows and Statements of Consolidated Equity for the periods presented:

   
For the Six Months
Ended June 30,
 
   
2011
  
2010
 
Cash distributions paid to noncontrolling interest:
      
Limited partners of Enterprise
 $--  $683.9 
Limited partners of Duncan Energy Partners
  21.9   21.3 
Joint venture partners
  12.9   15.3 
Total cash distributions paid to noncontrolling interest
 $34.8  $720.5 
Cash contributions from noncontrolling interest:
        
Limited partners of Enterprise
 $--  $960.0 
Limited partners of Duncan Energy Partners
  1.5   0.8 
Joint venture partners
  1.1   1.1 
Total cash contributions from noncontrolling interest
 $2.6  $961.9 

Declared Quarterly Cash Distribution Rates
The following table presents our declared quarterly cash distribution rates with respect to the quarters indicated:

   
Distribution Per Common Unit
 
Record
Date
Payment
Date
2011
      
1st Quarter
 $0.5975 
04/29/11
05/06/11
2nd Quarter
 $0.6050 
07/29/11
08/10/11