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Earnings Per Unit (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
BASIC EARNINGS PER UNIT |  |  |
Net income attributable to limited partners |  | $ 1,350.1 | $ 1,260.5
Earnings allocated to phantom unit awards | [1] | (9.9) | (7.8)
Net income available to common unitholders |  | $ 1,340.2 | $ 1,252.7
Basic weighted-average number of common units outstanding (in units) |  | 2,188.9 | 2,187.1
Basic earnings per unit (in dollars per unit) |  | $ 0.61 | $ 0.57
DILUTED EARNINGS PER UNIT |  |  |
Net income attributable to limited partners |  | $ 1,350.1 | $ 1,260.5
Diluted weighted-average number of units outstanding: |  |  |
Distribution-bearing common units (in units) |  | 2,188.9 | 2,187.1
Phantom units (in units) | [1] | 15.1 | 12.4
Total (in units) |  | 2,204.0 | 2,199.5
Diluted earnings per unit (in dollars per unit) |  | $ 0.61 | $ 0.57
[1] | Phantom units are considered participating securities for purposes of computing basic earnings per unit. See Note 13 for information regarding our phantom units.

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