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Subsequent Event (Tables)
6 Months Ended
Jun. 30, 2014
Subsequent Event [Abstract]  
Schedule of Subsequent Event
The following table presents pro forma earnings per unit (giving retroactive effect solely to the unit split) for the periods indicated:

 
For the Three Months
For the Six Months
 
Ended June 30,
Ended June 30,
 
2014
2013
2014
2013
Net income available to common unitholders (see Note 13)
$
636.5
$
552.5
$
1,433.8
$
1,306.0
 
Basic earnings per unit:
   Weighted-average number of common units outstanding, as reported
915.5
889.1
914.8
885.4
   Weighted-average number of common units outstanding, pro forma
1,831.0
1,778.2
1,829.6
1,770.8
   Basic earnings per unit, as reported
$
0.70
$
0.62
$
1.57
$
1.48
   Basic earnings per unit, pro forma
$
0.35
$
0.31
$
0.78
$
0.74
 
Diluted earnings per unit:
   Weighted-average number of common units outstanding, as reported
940.2
918.5
939.1
914.8
   Weighted-average number of common units outstanding, pro forma
1,880.4
1,837.0
1,878.2
1,829.6
   Diluted earnings per unit, as reported
$
0.68
$
0.60
$
1.53
$
1.43
   Diluted earnings per unit, pro forma
$
0.34
$
0.30
$
0.76
$
0.71