Debt Changes in Debt (Details) (USD $)					2 Months Ended		2 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Kinder Morgan Energy Partners, L.P. [Member]	Feb. 17, 2014 Kinder Morgan Energy Partners, L.P. [Member] KMP Senior Notes issued on February 24, 2014 [Member]	Feb. 24, 2014 Kinder Morgan Energy Partners, L.P. [Member] KMP 3.50% Senior Notes due March 1, 2021 [Member]	Feb. 17, 2014 Kinder Morgan Energy Partners, L.P. [Member] KMP 3.50% Senior Notes due March 1, 2021 [Member]	Feb. 24, 2014 Kinder Morgan Energy Partners, L.P. [Member] KMP 5.50% Senior Notes due March 1, 2044 [Member]	Feb. 17, 2014 Kinder Morgan Energy Partners, L.P. [Member] KMP 5.50% Senior Notes due March 1, 2044 [Member]	Jun. 30, 2014 Revolving Credit Facility [Member] Kinder Morgan Energy Partners, L.P. [Member] KMP five-year senior unsecured revolving credit facility maturing May 1, 2018. [Member]	Jan. 15, 2014 Revolving Credit Facility [Member] UBS [Member] Kinder Morgan Energy Partners, L.P. [Member] Syndicate of of financial institutions [Member] Liquidity Facility [Member]	Jun. 30, 2014 Commercial Paper [Member] Kinder Morgan Energy Partners, L.P. [Member] KMP five-year senior unsecured revolving credit facility maturing May 1, 2018. [Member]	Jan. 15, 2014 Commercial Paper [Member] Kinder Morgan Energy Partners, L.P. [Member] KMP five-year senior unsecured revolving credit facility maturing May 1, 2018. [Member]	Dec. 31, 2013 Commercial Paper [Member] Kinder Morgan Energy Partners, L.P. [Member] KMP five-year senior unsecured revolving credit facility maturing May 1, 2018. [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity										$ 1,000,000,000	$ 2,700,000,000	$ 3,700,000,000	$ 2,700,000,000
Line of Credit Facility, Amount Outstanding	0	0	0						0
Debt Instrument, Face Amount				1,500,000,000		750,000,000		750,000,000
Debt Instrument, Interest Rate, Stated Percentage						3.50%		5.50%
Proceeds from Issuance of Senior Long-term Debt					$ 743,000,000		$ 739,000,000