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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

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- 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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- Details
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