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Revenues and Accounts Receivable - Disaggregation of Revenue (Details) - Operating Segments - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 35,371	$ 35,812
Supply And Logistics
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	31,966	32,700
Supply And Logistics | Crude oil transactions
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	30,082	29,592
Supply And Logistics | NGL and other transactions
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,884	3,108
Transportation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,283	1,976
Transportation | Total tariff activities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,138	1,827
Transportation | Crude oil pipelines
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	2,039	1,724
Transportation | NGL pipelines
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	99	103
Transportation | Trucking
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	145	149
Facilities
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,122	1,136
Facilities | Crude oil, NGL and other terminalling and storage
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	697	688
Facilities | NGL and natural gas processing and fractionation
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	349	364
Facilities | Rail load / unload
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 76	$ 84

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No definition available.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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