Duration of operating agreement

No definition available.

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- Definition

Management fee charged to related party as a percentage of operating income

+ References

No definition available.

+ Details

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- Definition

Management fees received from related party

+ References

No definition available.

+ Details

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- Definition

Noncontrolling interest, percent sold

+ References

No definition available.

+ Details

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- Definition

Number of members of risk management committee

+ References

No definition available.

+ Details

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- Definition

Costs of sales and operating expenses for the period incurred from transactions with related parties.

+ 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)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ 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=6880815&loc=d3e20235-122688

+ Details

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Period Type:	duration

- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 57

-Paragraph 2

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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- Definition

Reflects the sum of all other revenue and income realized from sales and other transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party during the period.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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Related Party Transactions Operations (Details) (USD $)	12 Months Ended																	12 Months Ended
Related Party Transactions Operations (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2010 Kinder Morgan Power Company [Member]	Dec. 31, 2012 Kinder Morgan, Inc. [Member]	Dec. 31, 2011 Kinder Morgan, Inc. [Member]	Dec. 31, 2010 Kinder Morgan, Inc. [Member]	Dec. 31, 2012 Rockies Express Pipeline LLC [Member]	Dec. 31, 2011 Rockies Express Pipeline LLC [Member]	Dec. 31, 2010 Rockies Express Pipeline LLC [Member]	Dec. 31, 2012 Natural Gas Pipeline Company of America LLC [Member]	Dec. 31, 2011 Natural Gas Pipeline Company of America LLC [Member]	Dec. 31, 2010 Natural Gas Pipeline Company of America LLC [Member]	Dec. 31, 2011 Kirby Corporation [Member]	Dec. 31, 2010 Kirby Corporation [Member]	Dec. 31, 2012 Cypress Interstate Pipeline LLC [Member]	Oct. 01, 2010 Cypress Interstate Pipeline LLC [Member]	Dec. 31, 2012 Natural Gas Pipeline Company of America LLC [Member] Kinder Morgan, Inc. [Member]	Dec. 31, 2012 General Liability [Member] Kinder Morgan, Inc. [Member]
Related Party Transaction [Line Items]
Equity Method Investment, Ownership Percentage																50.00%		20.00%
Noncontrolling interest, percent sold																	50.00%
General and Administrative Expense	$ 493,000,000	$ 473,000,000	$ 375,000,000		$ 88,000,000	$ 71,000,000	$ 56,000,000
Management fee charged to related party as a percentage of operating income								1.00%
Management fees received from related party								5,000,000	6,000,000	5,000,000
Duration of operating agreement																		15 years
Costs and Expenses, Related Party											5,000,000	8,000,000	8,000,000
Related Party Transaction, Expenses from Transactions with Related Party				8,000,000										38,729	39,828				9,000,000
Related Party Transaction, Other Revenues from Transactions with Related Party														$ 44,615
Number of members of risk management committee	18