Debt Credit Facilities (Details) (USD $)					6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Line of Credit [Member]	Jun. 30, 2014 Kinder Morgan Energy Partners, L.P. [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]	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, Amount Outstanding	$ 0	$ 0		$ 0	$ 0
Line of Credit Facility, Maximum Borrowing Capacity						2,700,000,000	3,700,000,000	2,700,000,000
Debt Instrument, Term					5 years
Line of Credit Facility, Remaining Borrowing Capacity					1,807,000,000
Line of Credit Facility, Amount Current Borrowing Capacity is Reduced			893,000,000
Commercial Paper		979,000,000				513,000,000
Letters of Credit Outstanding, Amount					205,000,000
Indemnified by parent of subsidiary debt				$ 175,000,000