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Partners' Capital and Distributions - Units Outstanding (Details) - shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Series A Preferred Units
Activity for preferred units and common units
Outstanding, beginning of period (units)	71,090,468	69,696,542
Issuance of Series A preferred units in connection with in-kind distributions (units)		1,393,926
Outstanding, end of period (units)	71,090,468	71,090,468
Series B Preferred Units
Activity for preferred units and common units
Outstanding, beginning of period (units)	800,000	800,000
Outstanding, end of period (units)	800,000	800,000
Common Units
Activity for preferred units and common units
Outstanding, beginning of period (units)	726,361,924	725,189,138
Issuances of common units under equity-indexed compensation plans	423,889	17,766
Outstanding, end of period (units)	726,785,813	725,206,904

X

- Definition

Number of units distributed for payment of a unit distribution to unit-holder of limited partnership (LP).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
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- Definition

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+ References

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- Definition

The number of limited partner units outstanding.

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-SubTopic 10
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- Definition

The number of units issued due to unit-based compensation.

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