STATEMENTS OF CONSOLIDATED EQUITY (USD $) In Millions, unless otherwise specified	Total	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interests [Member]	Limited Partners [Member]
Balance at Dec. 31, 2011	$ 12,219.3	$ (351.4)	$ 105.9	$ 12,464.8
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	2,428.0us-gaap_ProfitLoss	0	8.1	2,419.9
Cash distributions paid to limited partners	(2,178.6)	0	0	(2,178.6)
Cash distributions paid to noncontrolling interests	(13.3)	0	(13.3)	0
Cash contributions from noncontrolling interests	6.6	0	6.6	0
Net cash proceeds from the issuance of common units	816.8	0	0	816.8
Amortization of fair value of equity-based awards	58.9	0	0	58.9
Cash flow hedges	(22.5)	(22.5)	0	0
Other	(19.2)us-gaap_PartnersCapitalOther	3.5	1.0	(23.7)
Balance at Dec. 31, 2012	13,296.0	(370.4)	108.3	13,558.1
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	2,607.1us-gaap_ProfitLoss	0	10.2	2,596.9
Cash distributions paid to limited partners	(2,400.3)	0	0	(2,400.3)
Cash distributions paid to noncontrolling interests	(8.9)	0	(8.9)	0
Cash contributions from noncontrolling interests	115.4	0	115.4	0
Net cash proceeds from the issuance of common units	1,792.0	0	0	1,792.0
Amortization of fair value of equity-based awards	72.4	0	0	72.4
Cash flow hedges	11.0	11.0	0	0
Other	(44.3)us-gaap_PartnersCapitalOther	0.4	0.6	(45.3)
Balance at Dec. 31, 2013	15,440.4	(359.0)	225.6	15,573.8
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income	2,833.5us-gaap_ProfitLoss	0	46.1	2,787.4
Cash distributions paid to limited partners	(2,638.1)	0	0	(2,638.1)
Cash payments made in connection with distribution equivalent rights	(3.7)	0	0	(3.7)
Cash distributions paid to noncontrolling interests	(48.6)	0	(48.6)	0
Cash contributions from noncontrolling interests	4.0	0	4.0	0
Common units issued and noncontrolling interests acquired in connection with Step 1 of Oiltanking acquisition	3,568.7	0	1,397.2	2,171.5
Net cash proceeds from the issuance of common units	388.8	0	0	388.8
Amortization of fair value of equity-based awards	87.0	0	5.2	81.8
Cash flow hedges	117.0	117.0	0	0
Other	(56.8)us-gaap_PartnersCapitalOther	0.4	(0.5)	(56.7)
Balance at Dec. 31, 2014	$ 19,692.2	$ (241.6)	$ 1,629.0	$ 18,304.8

Issuance of common units pursuant to Oiltanking acquisition.

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Total cash payments made in connection with distribution equivalent rights.

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Decrease in noncontrolling interest balance from payment of dividends or other distributions by the non-wholly owned subsidiary or partially owned entity, included in the consolidation of the parent entity, to the noncontrolling interest holders.

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Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Total distributions to each class of partners (i.e., general, limited and preferred partners).

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Total change in each class of partners' capital accounts during the year due to the sale of units. All partners include general, limited and preferred partners.

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Total change in each class of partners' capital accounts during the year due to unit-based compensation. All partners include general, limited and preferred partners.

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Amount of partners' capital (deficit), including portions attributable to both the parent and noncontrolling interests. Excludes temporary equity and is sometimes called permanent equity.

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This element represents movements included in the statement of changes in partners' capital which are not separately disclosed or provided for elsewhere in the taxonomy.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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