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Earnings Per Unit (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
BASIC EARNINGS PER COMMON UNIT        
Net income attributable to common unitholders $ 1,318 $ 1,360 $ 3,961 $ 4,067
Earnings allocated to phantom unit awards [1] (12) (11) (36) (34)
Net income allocated to common unitholders $ 1,306 $ 1,349 $ 3,925 $ 4,033
Basic weighted-average number of common units outstanding (in units) 2,172 2,179 2,173 2,179
Basic earnings per common unit (in dollars per unit) $ 0.6 $ 0.62 $ 1.81 $ 1.85
DILUTED EARNINGS PER COMMON UNIT        
Net income attributable to common unitholders $ 1,318 $ 1,360 $ 3,961 $ 4,067
Net income attributable to preferred units 1 1 3 3
Net income attributable to limited partners $ 1,319 $ 1,361 $ 3,964 $ 4,070
Diluted weighted-average number of units outstanding:        
Distribution-bearing common units (in units) 2,172 2,179 2,173 2,179
Phantom units (in units) [2] 20 18 20 19
Preferred units (in units) [2] 2 2 2 2
Total (in units) 2,194 2,199 2,195 2,200
Diluted earnings per common unit (in dollars per unit) $ 0.6 $ 0.62 $ 1.81 $ 1.85
[1] Phantom units are considered participating securities for purposes of computing basic earnings per unit. See Note 12 for information regarding the phantom units.
[2] We use the “if-converted method” to determine the potential dilutive effect of the vesting of phantom unit awards and the conversion of preferred units outstanding.  See Note 12 for information regarding phantom unit awards.  See Note 8 for information regarding preferred units.