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Partners' Capital and Distributions - Units Outstanding (Details) - shares	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Series A Preferred Units
Activity for preferred units and common units
Outstanding, beginning of period (units)	71,090,468	71,090,468	71,090,468	71,090,468	71,090,468	71,090,468
Outstanding, end of period (units)	71,090,468	71,090,468	71,090,468	71,090,468	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	800,000	800,000	800,000	800,000
Outstanding, end of period (units)	800,000	800,000	800,000	800,000	800,000	800,000
Common Units
Activity for preferred units and common units
Outstanding, beginning of period (units)	728,100,398	728,053,007	728,028,576	727,424,619	726,785,813	726,361,924
Issuances of common units under equity-indexed compensation plans (units)	376,193	47,391	24,431	603,957	638,806	423,889
Outstanding, end of period (units)	728,476,591	728,100,398	728,053,007	728,028,576	727,424,619	726,785,813

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

The number of limited partner units outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

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- Definition

Number of units issued for unit-based payment arrangement issued by partnership. Partner includes, but is not limited to, general, limited and preferred partners.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

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