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Equity and Distributions (Tables) | 6 Months Ended
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Jun. 30, 2013
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 our common units outstanding during the six months ended June 30, 2013:
|  | Common Units (Unrestricted) |  |  | Restricted Common Units |  |  | Total Common Units |
Number of units outstanding at December 31, 2012 |  |  | 894,919,851 |  |  |  | 3,893,486 |  |  |  | 898,813,337 |
Common units issued in connection with underwritten offering |  |  | 9,200,000 |  |  |  | -- |  |  |  | 9,200,000 |
Common units issued in connection with our at-the-market program |  |  | 3,766,557 |  |  |  | -- |  |  |  | 3,766,557 |
Common units issued in connection with our DRIP and EUPP |  |  | 2,440,784 |  |  |  | -- |  |  |  | 2,440,784 |
Common units issued in connection with the vesting of unit options |  |  | 200,882 |  |  |  | -- |  |  |  | 200,882 |
Common units issued in connection with the vesting of restricted common unit awards |  |  | 1,830,010 |  |  |  | (1,830,010 | ) |  |  | -- |
Restricted common unit awards issued |  |  | -- |  |  |  | 1,748,476 |  |  |  | 1,748,476 |
Forfeiture of restricted common unit awards |  |  | -- |  |  |  | (120,882 | ) |  |  | (120,882 | )
Acquisition and cancellation of treasury units in connection with the vesting of equity-based awards |  |  | (614,191 | ) |  |  | -- |  |  |  | (614,191 | )
Number of units outstanding at June 30, 2013 |  |  | 911,743,893 |  |  |  | 3,691,070 |  |  |  | 915,434,963 |
Reclassification out of Accumulated Other Comprehensive Income (Loss) | The following table presents reclassifications out of accumulated other comprehensive income (loss) into net income during the three and six months ended June 30, 2013:
| Location |  | For the Three Months Ended June 30, 2013 |  |  | For the Six Months Ended June 30, 2013 |
Losses (gains) on cash flow hedges: |  |  |  |  |  |  |
Interest rate derivatives | Interest expense |  | $ | 7.8 |  |  | $ | 13.7 |
Commodity derivatives | Revenue |  |  | (7.2 | ) |  |  | 0.5 |
Commodity derivatives | Operating costs and expenses |  |  | -- |  |  |  | (0.4 | )
Total |  |  | $ | 0.6 |  |  | $ | 13.8 |
Declared Quarterly Cash Distribution Rates | The following table presents our declared quarterly cash distribution rates per common unit with respect to the quarters indicated:
|  | Distribution Per Common Unit |  | Record Date | Payment Date
2013 |  |  |  |  |
1st Quarter |  | $ | 0.67 |  | 04/30/13 | 05/07/13
2nd Quarter |  | $ | 0.68 |  | 07/31/13 | 08/07/13

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