Capital expenditures made to expand the existing operating and/or earnings capacity of the entity's assets.

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Capital expenditures for the replacement of partially or fully depreciated assets in order to maintain the operating and/or earnings capacity of the company's existing assets.

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No definition available.

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Revenues and equity earnings in unconsolidated entities less (a) purchases and related costs, (b) field operating costs and (c) segment general and administrative expenses, plus the entity’s proportionate share of the depreciation and amortization expense and gains and losses on significant asset sales of unconsolidated entities, and further adjusted for certain selected items including (i) gains or losses on derivative on derivative instruments that are related to underlying activities in another period (or the reversal of such adjustments from a prior period), gains and losses on derivatives that are related to investing activities (such as the purchase of linefill) and inventory valuation adjustments, as applicable, (ii) long-term inventory costing adjustments, (iii) charges for obligations that are expected to be settled with the issuance of equity instruments, (iv) amounts related to deficiencies associated with minimum volume commitments, net of applicable amounts subsequently recognized into revenue and (v) other items that the Chief Operating Decision Maker believes are integral to understand the entity’s core segment operating performance.

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No definition available.

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- Definition

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(12))
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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 45
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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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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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Operating Segments - Segment Financial Data (Details) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($) segment	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)
Operating Segments
Operating segments number \| segment									3
Revenues:
Revenues	$ 7,605	$ 5,873	$ 6,078	$ 6,667	$ 5,952	$ 5,170	$ 4,950	$ 4,111	$ 26,223	$ 20,182	$ 23,152
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments
Equity earnings in unconsolidated entities									290	195	183
Segment adjusted EBITDA									2,081	2,167	2,212
Capital expenditures									2,458	1,694	2,275
Maintenance capital									247	186	220
Total assets	25,351				24,210				25,351	24,210	22,288
Investments in unconsolidated entities	2,756				2,343				2,756	2,343	2,027
Transportation
Revenues:
Revenues									1,021	954	953
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments
Equity earnings in unconsolidated entities									290	195	183
Segment adjusted EBITDA									1,287	1,141	1,056
Capital expenditures									2,126	1,063	1,278
Maintenance capital									120	121	144
Total assets	12,661				10,917				12,661	10,917	10,345
Investments in unconsolidated entities	2,681				2,290				2,681	2,290	1,998
Facilities
Revenues:
Revenues									555	546	528
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments
Segment adjusted EBITDA									734	667	588
Capital expenditures									312	577	813
Maintenance capital									114	55	68
Total assets	7,313				7,556				7,313	7,556	7,330
Investments in unconsolidated entities	75				53				75	53	29
Supply and Logistics
Revenues:
Revenues									25,056	19,004	21,927
Segment Reporting, Disclosure of Other Information about Entity's Reportable Segments
Segment adjusted EBITDA									60	359	568
Capital expenditures									20	54	184
Maintenance capital									13	10	8
Total assets	$ 5,377				$ 5,737				5,377	5,737	4,613
Operating Segments
Revenues:
Revenues									27,956	21,709	24,589
Operating Segments \| Transportation
Revenues:
Revenues									1,718	1,584	1,594
Operating Segments \| Facilities
Revenues:
Revenues									1,173	1,107	1,050
Operating Segments \| Supply and Logistics
Revenues:
Revenues									25,065	19,018	21,945
Intersegment
Revenues:
Revenues									(1,733)	(1,527)	(1,437)
Intersegment \| Transportation
Revenues:
Revenues									(697)	(630)	(641)
Intersegment \| Facilities
Revenues:
Revenues									(618)	(561)	(522)
Intersegment \| Supply and Logistics
Revenues:
Revenues									(9)	(14)	(18)
Intersegment Adjustment
Revenues:
Revenues									$ (409)	$ (322)	$ (256)