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Business Segments, Consolidated Revenues and Expenses (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Consolidated Revenues [Abstract] |  |  |
Total consolidated revenues |  | $ 9,298.5 | $ 7,320.4
Operating costs and expenses: |  |  |
Cost of sales | [1] | 7,140.4 | 5,335.7
Other operating costs and expenses | [2] | 687.6 | 610.4
Depreciation, amortization and accretion |  | 394.3 | 376.2
Asset impairment and related charges |  | 0.9 | 11.2
Net gains attributable to asset sales |  | (0.5) | (0.3)
General and administrative costs |  | 53.0 | 50.4
Total consolidated costs and expenses |  | 8,275.7 | 6,383.6
NGL Pipelines & Services [Member] |  |  |
Consolidated Revenues [Abstract] |  |  |
Total consolidated revenues |  | 3,413.3 | 3,345.8
Crude Oil Pipelines & Services [Member] |  |  |
Consolidated Revenues [Abstract] |  |  |
Total consolidated revenues |  | 3,570.9 | 1,807.2
Natural Gas Pipelines & Services [Member] |  |  |
Consolidated Revenues [Abstract] |  |  |
Total consolidated revenues |  | 804.8 | 761.2
Petrochemical & Refined Products Services [Member] |  |  |
Consolidated Revenues [Abstract] |  |  |
Total consolidated revenues |  | $ 1,509.5 | $ 1,406.2
[1] | Cost of sales is a component of "Operating costs and expenses" as presented on our Unaudited Condensed Statements of Consolidated Operations. Fluctuations in these amounts are primarily due to changes in energy commodity prices and sales volumes associated with our marketing activities.
[2] | Represents the cost of operating our plants, pipelines and other fixed assets excluding: depreciation, amortization and accretion charges; asset impairment and related charges; and net losses (or gains) attributable to asset sales.

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- Definition The amount of expense recognized and charged to operating costs and expenses in the current period that reflects the allocation of the cost of assets over the assets' useful lives. + References No definition available. + Details
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- Definition The difference between the sale price or salvage price and the book value of a property, plant, and equipment asset that was sold or retired during the reporting period. This element refers to the gain (loss) recorded in operating costs and expenses. + References No definition available. + Details
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- Definition The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale). + References No definition available. + Details
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- Definition Total costs related to goods produced and sold during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Total costs of sales and operating expenses for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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