Number of Offshore Hubs

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Payments to Acquire Businesses, Working Capital

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Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees.

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Amount of asset retirement obligations incurred during the period.

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- Definition

Amount of direct costs of the business combination including legal, accounting, and other costs incurred to consummate the business acquisition.

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No definition available.

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Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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- Definition

The number of limited partner units issued.

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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No definition available.

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- Definition

Monetary value of the issuance of new units of limited partnership interest in a public offering, net of offering costs. This is a parenthetical disclosure.

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- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

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The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

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No definition available.

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The cash inflow from the issuance of preferred limited partners units during the period.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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No definition available.

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- Definition

Value of new stock classified as temporary equity issued during the period.

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No definition available.

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Acquisitions (Narrative) (Details)								1 Months Ended	12 Months Ended
Acquisitions (Narrative) (Details)	Sep. 01, 2017 USD ($)	Mar. 24, 2017 USD ($)	Jul. 27, 2016 USD ($)	Jul. 24, 2015 USD ($) platform	Jul. 23, 2015 USD ($)	Jul. 22, 2015 USD ($)	Apr. 10, 2015 USD ($)	Jul. 31, 2015 USD ($) shares	Dec. 31, 2017 USD ($) shares	Dec. 31, 2016 USD ($) shares	Dec. 31, 2015 USD ($)	Aug. 14, 2017 USD ($)	Jul. 25, 2015
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross									$ 1,325,759,000	$ 25,394,000	$ 1,520,299,000
Proceeds from issuance of Class A convertible preferred units, net									$ 726,419,000	$ 0	0
Common units issued (in shares) \| shares									122,579,218	117,979,218
Net proceeds received from sale of units, net of underwriter discounts		$ 140,513,000	$ 298,452,000			$ 437,164,000	$ 198,168,000
Asset retirement obligation, preliminary fair value										$ 20,940,000
Asset retirement obligation, retirement costs									$ 198,187,000	213,726,000	188,662,000
Poseidon Oil Pipeline Company [Member]
Business Acquisition [Line Items]
Equity investment, ownership percentage									64.00%
SEKCO [Member]
Business Acquisition [Line Items]
Equity investment, ownership percentage													50.00%
Accrued Liabilities [Member]
Business Acquisition [Line Items]
Asset retirement obligation, retirement costs									$ 20,900,000	22,400,000
Convertible Preferred Stock [Member]
Business Acquisition [Line Items]
Temporary Equity, Stock Issued During Period, Value, New Issues	$ 750,000,000
Convertible Preferred Stock [Member] \| Private Placement [Member]
Business Acquisition [Line Items]
Temporary Equity, Stock Issued During Period, Value, New Issues	750,000,000
6.500% senior unsecured notes
Business Acquisition [Line Items]
Debt issued, aggregate principal amount									550,000,000	0
6.750% senior unsecured notes
Business Acquisition [Line Items]
Debt issued, aggregate principal amount					$ 750,000,000				750,000,000	750,000,000
Alkali Business [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	1,325,000,000
Payments to Acquire Businesses, Working Capital	$ 105,000,000
Acquisition related costs									$ 12,000,000
Alkali Business [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Estimated useful lives of property and equipment acquired	2 years
Alkali Business [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Estimated useful lives of property and equipment acquired	30 years
Alkali Business [Member] \| Convertible Preferred Stock [Member] \| Private Placement [Member]
Business Acquisition [Line Items]
Temporary Equity, Stock Issued During Period, Value, New Issues	$ 750,000,000
Proceeds from issuance of Class A convertible preferred units, net	726,400,000
Alkali Business [Member] \| 6.500% senior unsecured notes
Business Acquisition [Line Items]
Debt issued, aggregate principal amount	$ 550,000,000											$ 550,000,000
Debt instrument, stated rate	6.50%											6.50%
Proceeds from issuance of debt, net of discount	$ 540,100,000
Enterprise Offshore Acquisition [Member]
Business Acquisition [Line Items]
Debt issued, aggregate principal amount								$ 750,000,000
Acquisition related costs										$ 1,000,000	15,000,000
Transaction costs related to business acquisition				$ 1,500,000,000
Business Acquisition, Effective Date of Acquisition				Jul. 24, 2015
Number of offshore hub platforms \| platform				6
Common units issued (in shares) \| shares								10,350,000
Net proceeds received from sale of units, net of underwriter discounts								$ 437,200,000
Estimated useful life of finite-lived intangible assets acquired				19 years
Asset retirement obligation, preliminary fair value											$ 158,200,000
Enterprise Offshore Acquisition [Member] \| Poseidon Oil Pipeline Company [Member]
Business Acquisition [Line Items]
Equity investment, ownership percentage				36.00%
Enterprise Offshore Acquisition [Member] \| SEKCO [Member]
Business Acquisition [Line Items]
Equity investment, ownership percentage				50.00%	50.00%						50.00%
Enterprise Offshore Acquisition [Member] \| CHOPS [Member]
Business Acquisition [Line Items]
Equity investment, ownership percentage				50.00%	50.00%						50.00%
Enterprise Offshore Acquisition [Member] \| Independence Hub, LLC [Member]
Business Acquisition [Line Items]
Equity investment, ownership percentage				80.00%
Noncontrolling interest ownership percentage				20.00%
Enterprise Offshore Acquisition [Member] \| Accrued Liabilities [Member]
Business Acquisition [Line Items]
Asset retirement obligation, retirement costs											$ 9,800,000
Enterprise Offshore Acquisition [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Estimated useful lives of property and equipment acquired				2 years
Enterprise Offshore Acquisition [Member] \| Maximum [Member]
Business Acquisition [Line Items]
Estimated useful lives of property and equipment acquired				35 years
Enterprise Offshore Acquisition [Member] \| 6.750% senior unsecured notes
Business Acquisition [Line Items]
Debt instrument, stated rate					6.75%
Proceeds from issuance of debt, net of discount					$ 728,600,000