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Equity and Distributions (Tables)
 12 Months Ended
Dec. 31, 2014
Equity and Distributions [Abstract]  
Summary of Changes in Outstanding Units
Partners' equity reflects the various classes of limited partner interests (i.e., common units, including restricted common units, and Class B units) that we have outstanding.  The following table summarizes changes in the number of Enterprise's outstanding units since December 31, 2011:

 
 
Common
Units
(Unrestricted)
  
Restricted
Common
Units
  
Total
Common
Units
 
Number of units outstanding at December 31, 2011
  
1,755,504,404
   
7,736,432
   
1,763,240,836
 
Common units issued in connection with underwritten offering
  
18,400,000
   
--
   
18,400,000
 
Common units issued in connection with at-the-market program
  
7,957,090
   
--
   
7,957,090
 
Common units issued in connection with DRIP and EUPP
  
5,629,320
   
--
   
5,629,320
 
Common units issued in connection with the vesting and exercise of unit options
  
427,828
   
--
   
427,828
 
Common units issued in connection with the vesting of restricted common unit awards
  
2,633,206
   
(2,633,206
)
  
--
 
Common units issued in connection with the vesting of other types of equity-based awards
  
104,336
   
--
   
104,336
 
Restricted common unit awards issued
  
--
   
3,177,476
   
3,177,476
 
Forfeiture of restricted common unit awards
  
--
   
(493,730
)
  
(493,730
)
Acquisition and cancellation of treasury units in connection with the vesting of equity-based awards
  
(816,482
)
  
--
   
(816,482
)
Number of units outstanding at December 31, 2012
  
1,789,839,702
   
7,786,972
   
1,797,626,674
 
Common units issued in connection with underwritten offering
  
36,800,000
   
--
   
36,800,000
 
Common units issued in connection with at-the-market program
  
15,249,378
   
--
   
15,249,378
 
Common units issued in connection with DRIP and EUPP
  
10,308,254
   
--
   
10,308,254
 
Common units issued in connection with the vesting and exercise of unit options
  
401,764
   
--
   
401,764
 
Common units issued in connection with the vesting of restricted common unit awards
  
3,770,696
   
(3,770,696
)
  
--
 
Conversion and reclassification of Class B units to common units
  
9,040,862
   
--
   
9,040,862
 
Restricted common unit awards issued
  
--
   
3,549,052
   
3,549,052
 
Forfeiture of restricted common unit awards
  
--
   
(344,114
)
  
(344,114
)
Acquisition and cancellation of treasury units in connection with the vesting of equity-based awards
  
(1,261,854
)
  
--
   
(1,261,854
)
Number of units outstanding at December 31, 2013
  
1,864,148,802
   
7,221,214
   
1,871,370,016
 
Common units issued in connection with at-the-market program
  
1,590,334
   
--
   
1,590,334
 
Common units issued in connection with DRIP and EUPP
  
9,754,227
   
--
   
9,754,227
 
Common units issued in connection with Step 1 of Oiltanking acquisition
  
54,807,352
   
--
   
54,807,352
 
Common units issued in connection with the vesting and exercise of unit options
  
1,014,108
   
--
   
1,014,108
 
Common units issued in connection with the vesting of phantom unit awards
  
23,311
   
--
   
23,311
 
Common units issued in connection with the vesting of restricted common unit awards
  
2,634,074
   
(2,634,074
)
  
--
 
Forfeiture of restricted common unit awards
  
--
   
(357,350
)
  
(357,350
)
Acquisition and cancellation of treasury units in connection with the vesting of equity-based awards
  
(894,383
)
  
--
   
(894,383
)
Other
  
17,202
   
--
   
17,202
 
Number of units outstanding at December 31, 2014
  
1,933,095,027
   
4,229,790
   
1,937,324,817
 
Components of Accumulated Other Comprehensive Income (Loss)
The following tables present the components of accumulated other comprehensive income (loss) as reported on our Consolidated Balance Sheets at the dates indicated:
 
 
 
Gains (Losses) on
Cash Flow Hedges
  
  
 
 
 
Commodity
Derivative
Instruments
  
Interest Rate
Derivative
Instruments
  
Other
  
Total
 
Balance, December 31, 2012
 
$
10.1
  
$
(383.0
)
 
$
2.5
  
$
(370.4
)
Other comprehensive income before reclassifications
  
(46.9
)
  
6.6
   
0.4
   
(39.9
)
Amounts reclassified from accumulated other comprehensive loss
  
22.1
   
29.2
   
--
   
51.3
 
Total other comprehensive income (loss)
  
(24.8
)
  
35.8
   
0.4
   
11.4
 
Balance, December 31, 2013
  
(14.7
)
  
(347.2
)
  
2.9
   
(359.0
)
Other comprehensive income before reclassifications
  
161.3
   
--
   
0.4
   
161.7
 
Amounts reclassified from accumulated other comprehensive (income) loss
  
(76.7
)
  
32.4
   
--
   
(44.3
)
Total other comprehensive income
  
84.6
   
32.4
   
0.4
   
117.4
 
Balance, December 31, 2014
 
$
69.9
  
$
(314.8
)
 
$
3.3
  
$
(241.6
)
Reclassifications out of Accumulated Other Comprehensive Income (Loss) Into Net Income
The following table presents reclassifications out of accumulated other comprehensive income (loss) into net income for the periods indicated:
 
 
  
 
For the Year Ended December 31,
 
 
Location
 
2014
  
2013
 
Losses (gains) on cash flow hedges:
     
Interest rate derivatives
Interest expense
 
$
32.4
  
$
29.2
 
Commodity derivatives
Revenue
  
(75.0
)
  
22.4
 
Commodity derivatives
Operating costs and expenses
  
(1.7
)
  
(0.3
)
Total
 
 
$
(44.3
)
 
$
51.3
 
Components of Noncontrolling Interests
The following table presents additional information regarding noncontrolling interests as presented on our Consolidated Balance Sheets at the dates indicated:

 
December 31,
 
 
2014
 
2013
 
Limited partners of Oiltanking other than EPO
 
$
1,408.9
  
$
--
 
Joint venture partners
  
220.1
   
225.6
 
Total
 
$
1,629.0
  
$
225.6
 
Components of Net Income Attributable to Noncontrolling Interests
The following table presents the components of net income attributable to noncontrolling interests as presented on our Statements of Consolidated Operations for the periods indicated:

 
For the Year Ended December 31,
 
 
2014
 
2013
 
2012
 
Limited partners of Oiltanking other than EPO
 
$
14.2
  
$
--
  
$
--
 
Joint venture partners
  
31.9
   
10.2
   
8.1
 
Total
 
$
46.1
  
$
10.2
  
$
8.1
 
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 interests as presented on our Statements of Consolidated Cash Flows and Statements of Consolidated Equity for the periods indicated:

 
 
For the Year Ended December 31,
 
 
 
2014
  
2013
  
2012
 
Cash distributions paid to noncontrolling interests:
      
Limited partners of Oiltanking other than EPO
 
$
7.7
  
$
--
  
$
--
 
Joint venture partners
  
40.9
   
8.9
   
13.3
 
Total
 
$
48.6
  
$
8.9
  
$
13.3
 
             
Cash contributions from noncontrolling interests:
            
Joint venture partners
 
$
4.0
  
$
115.4
  
$
6.6
 
Declared Quarterly Cash Distribution Rates
The following table presents Enterprise's declared quarterly cash distribution rates per common unit with respect to the quarter indicated.  Actual cash distributions are paid by Enterprise within 45 days after the end of each fiscal quarter.

 
 
Distribution Per
Common Unit
 
Record
Date
Payment
Date
2013:
 
 
 
   
1st Quarter
 
$
0.3350
 
4/30/2013
5/7/2013
2nd Quarter
 
$
0.3400
 
7/31/2013
8/7/2013
3rd Quarter
 
$
0.3450
 
10/31/2013
11/7/2013
4th Quarter
 
$
0.3500
 
1/31/2014
2/7/2014
2014:
    
 
    
1st Quarter
 
$
0.3550
 
4/30/2014
5/7/2014
2nd Quarter
 
$
0.3600
 
7/31/2014
8/7/2014
3rd Quarter
 
$
0.3650
 
10/31/2014
11/7/2014
4th Quarter
 
$
0.3700
 
1/30/2015
2/6/2015