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Environmental Matters (Details) $ in Millions							1 Months Ended			6 Months Ended	12 Months Ended	240 Months Ended
	Jun. 17, 2016 USD ($)	Jun. 08, 2016 USD ($)	Feb. 02, 2016 USD ($)	Nov. 08, 2013	Aug. 06, 2013 Defendants	Jul. 24, 2013	Jun. 30, 2016 USD ($)	Aug. 31, 2007 USD ($)	Dec. 31, 2000 Terminals	Jun. 30, 2016 USD ($) Terminals Parties Defendants	Dec. 31, 2010 USD ($)	Dec. 31, 1969	Dec. 31, 2015 USD ($)
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies							$ 318.0			$ 318.0			$ 284.0
Environmental recoveries receivable							13.0			$ 13.0			$ 13.0
Rare Metals Inc. [Member]
Loss Contingencies [Line Items]
Number of Uranium Mines												20
Environmental Protection Agency [Member] | Portland Harbor Superfund Site, Willamette River, Portland, Oregon [Member] | GATX Terminals Corporation (n/k/a KMLT) [Member]
Loss Contingencies [Line Items]
Number of Liquid Terminals | Terminals									2	4
Number of Parties Involved In Site Cleanup Allocation Negotiations | Parties										90
Loss Contingency, Damages Sought, Value		$ 750.0
Board of Commissioners of the Southeast Louisiana Flood Protection Authority - East [Member] | TGP and SNG [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Defendants						100
Parish of Plaquemines, Louisiana [Member] | Bastian Bay, Buras, Empire and Fort Jackson oil and gas fields of Plaquemines Parish [Member] | Tennessee Gas Pipeline Company LLC [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Defendants				17
Environmental Protection Agency [Member] | Settlement [Member] | Central Florida Pipeline LLC [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value							$ 0.5
Roosevelt Irrigation District v. Kinder Morgan G.P., Inc., Kinder Morgan Energy Partners, L.P. , U.S. District Court, Arizona [Member] | Pending Litigation [Member] | SFPP Phoenix Terminal [Member] | Unfavorable Regulatory Action [Member] | KMEP and SFPP [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value										$ 175.0
Loss Contingency, Number of Defendants | Defendants					26					70
United States District Court, Southern District of California, case number 07CV1883WCAB [Member] | Pending Litigation [Member] | Mission Valley Terminal Facility [Member] | Kinder Morgan Energy Partners, L.P. [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value			$ 365.0					$ 170.0			$ 365.0
United States District Court, Southern District of California, case number 07CV1883WCAB [Member] | Tentative Settlement [Member] | Mission Valley Terminal Facility [Member] | Kinder Morgan Energy Partners, L.P. [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value	$ 20.0		$ 160.0
Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of Parties at a Joint Defense Group							70			70
Environmental Remediation Expense										$ 1,700.0
Lower Passaic River Study Area [Member] | Pending Litigation [Member] | Environmental Protection Agency [Member]
Loss Contingencies [Line Items]
Number of Parties at a Joint Defense Group							80			80
Minimum [Member] | Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense										$ 365.0
Maximum [Member] | Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense										$ 3,200.0

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