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Reportable Segments Revenues (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues
Revenues	$ 13,705	$ 13,058	$ 14,403
Single customer exceeding 10% of total [Member]
Revenues
Revenues	0	0	0
Operating Segments | CO2
Revenues
Revenues	1,196	1,221	1,699
Operating Segments | Kinder Morgan Canada
Revenues
Revenues	256	253	260
Operating Segments | External Customer [Member] | Natural Gas Pipelines
Revenues
Revenues	8,608	7,998	8,704
Operating Segments | External Customer [Member] | Terminals
Revenues
Revenues	1,965	1,921	1,878
Operating Segments | External Customer [Member] | Products Pipelines
Revenues
Revenues	1,645	1,631	1,828
Operating Segments | Intersegment revenues | Natural Gas Pipelines
Revenues
Revenues	10	7	21
Operating Segments | Intersegment revenues | Terminals
Revenues
Revenues	1	1	1
Operating Segments | Intersegment revenues | Products Pipelines
Revenues
Revenues	16	18	3
Corporate, Non-Segment and intersegment eliminations
Revenues
Revenues	$ 8	$ 8	$ 9
Revenues from External Customers [Member]
Revenues
Concentration Risk, Percentage	10.00%	10.00%	10.00%

X

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6351-108592

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13531-108611

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=84177426&loc=d3e6404-108592

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77997519&loc=d3e13537-108611

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- Definition

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).

+ 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

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- Definition

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+ References

No definition available.

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