Risk Management Credit Risks (Details Textrual) (USD $)	3 Months Ended	6 Months Ended
Jun. 30, 2014 Kinder Morgan Energy Partners, L.P. [Member] notches	Jun. 30, 2014 One notch credit downgrade [Member] notches	Jun. 30, 2014 Two notch credit downgrade [Member] Kinder Morgan Energy Partners, L.P. [Member]	Jun. 30, 2014 One notch credit downgrade [Member] Kinder Morgan Energy Partners, L.P. [Member]
Credit Derivatives [Line Items]
Number of credit rating notches	2	1
Additional Collateral, Aggregate Fair Value			$ 122,000,000	$ 0

The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4H

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624258-113959

Name:	us-gaap_AdditionalCollateralAggregateFairValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant