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Reportable Segments Investments (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Investments	$ 7,759	$ 7,481
Natural Gas Pipelines
Segment Reporting Information [Line Items]
Investments	6,991	6,709
Products Pipelines
Segment Reporting Information [Line Items]
Investments	491	488
Terminals
Segment Reporting Information [Line Items]
Investments	251	268
CO2
Segment Reporting Information [Line Items]
Investments	$ 26	$ 16

X

- Definition

The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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X

- 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.

+ References

No definition available.

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