v3.19.2

Partners' Capital and Distributions (Schedule of Capital Units) (Details)	6 Months Ended
	Jun. 30, 2019 director shares
Increase (Decrease) in Partners' Capital [Roll Forward]
Limited partner units outstanding on January 1, 2018 (in shares)	228,195,160
Limited partner units outstanding on March 31, 2018 (in shares)	228,403,428
Management [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
During 2019–Other (in shares)	199,792
Director [Member]
Increase (Decrease) in Partners' Capital [Roll Forward]
During 2019–Other (in shares)	8,476
Partners' Capital Account, Unit-based Payment Arrangement, Number Of Independent Directors | director	4

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Partners' Capital Account, Unit-based Payment Arrangement, Number Of Independent Directors

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

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The number of limited partner units outstanding.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
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-Topic 272
-SubTopic 10
-Section 50
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Number of units issued for unit-based payment arrangement issued by partnership. Partner includes, but is not limited to, general, limited and preferred partners.

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-Name Accounting Standards Codification
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-SubTopic 10
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-Paragraph 1
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