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Partners' Capital and Distributions - Preferred Unit Issuance (Details) $ / shares in Units, shares in Millions, $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 28, 2016 USD ($) item $ / shares shares | Dec. 31, 2016 USD ($)
Partners Capital and Distributions |  |
Net proceeds from private placement | $ |  | $ 1,542
Series A Convertible Preferred Units |  |
Partners Capital and Distributions |  |
Private placement of units (in units) | shares | 61.0 |
Cash purchase price (in dollars per unit) | $ 26.25 |
Transaction fee due to purchasers | 2.00% |
Net proceeds from private placement | $ | $ 1,600 |
Quarterly distributions per unit (in dollars per unit) | $ 0.525 |
Annualized distribution rate (in dollars per unit) | $ 2.10 |
Preferred unit conversion ratio | 1 |
Common unit closing price as a percentage of Issue Price, over which the entity has conversion option | 150.00% |
Period for closing price of common units to be above threshold, to trigger conversion option | 20 days |
Period after fifth and subsequent anniversaries of issuance for Distribution Rate Resets | 30 days |
Number of distribution rate reset elections allowed | item | 1 |
Period after sixth anniversary of issuance, after which units may be redeemed if distribution rate has been reset | 30 days |
Value of common units if exchanged for redemption of preferred units, as a percentage of average price | 95.00% |
Redemption price as a percentage of Issue Price | 110.00% |
US Treasury Rate | Series A Convertible Preferred Units |  |
Partners Capital and Distributions |  |
Basis spread on variable rate | 5.85% |

X
- Definition The percentage transaction fee due to purchasers of units of limited partnership interest issued in a private placement. + References No definition available. + Details
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- Definition Price per unit of partnership interest sold during the period. + References No definition available. + Details
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- Definition The percentage of the volume-weighted average price of the partnership's common units for a specified trading period, at which such common units are valued if given in exchange for the redemption of the preferred units. + References No definition available. + Details
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- Definition The annualized distributions per unit to which holders of the preferred units are entitled. + References No definition available. + Details
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- Definition Ratio applied to the conversion of preferred units into common units. + References No definition available. + Details
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- Definition Threshold period of specified consecutive trading days for which the closing price of the partnership's common units must be above a specified level to trigger the conversion option by the entity. + References No definition available. + Details
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- Definition The closing price of the partnership's common units as a percentage of the Issue Price of the preferred units that must be exceeded for a certain period of days in order for the entity to convert the preferred units, subject to minimum time requirements and certain minimum conversion amounts. + References No definition available. + Details
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- Definition The percentage points to be added to the applicable rate of the ten-year U.S. Treasury to calculate the new distribution rate on the preferred units if the holders elect to reset the distribution rate. + References No definition available. + Details
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- Definition The number of times the holders of the preferred units may elect to reset the preferred unit distribution rate. + References No definition available. + Details
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- Definition Period following the fifth and each subsequent anniversary of the issuance date of the preferred units, within which the holders of the preferred units may elect to reset the preferred unit distribution rate. + References No definition available. + Details
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- Definition Period following the sixth anniversary of the issuance date of the preferred units, after which the entity may choose to redeem all or a portion of the outstanding preferred units, if the holders of the preferred units have exercised a distribution rate reset. + References No definition available. + Details
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- Definition Monetary value of the issuance of new units of limited partnership interest in a private placement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=27012166&loc=d3e187171-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=27012166&loc=d3e187085-122770 + Details
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