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Litigation, Environmental and Other Contingencies Environmental Matters (Details) $ in Millions									1 Months Ended	12 Months Ended	240 Months Ended
	Jan. 06, 2017 USD ($)	Oct. 05, 2016 USD ($)	Jul. 28, 2016	Jun. 08, 2016 USD ($)	Dec. 18, 2015 USD ($)	Nov. 08, 2013	Aug. 06, 2013 Defendants	Jul. 24, 2013	Dec. 31, 2000 Terminals	Dec. 31, 2017 USD ($) Terminals Parties Defendants	Dec. 31, 1969	Dec. 31, 2016 USD ($)
Loss Contingencies [Line Items]
Accrual for Environmental Loss Contingencies										$ 279		$ 302
Recorded Third-Party Environmental Recoveries Receivable										$ 13		$ 13
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
Estimated Remedy Implementation Period				13 years
Number of Parties Involoved In Site Cleanup | Parties										90
Loss Contingency, Damages Sought, Value	$ 1,100
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] | TGP [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Defendants						17
Judicial District of Louisiana [Member] | Vermilion Parish Louisiana Coastal Zone [Member] | TGP [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Defendants			52
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, Number of Defendants | Defendants							26			70
Loss Contingency, Damages Sought, Value										$ 175
Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of Parties at a Joint Defense Group										70
Vintage Assets Inc. [Member] | Parish of Plaquemines, Louisiana [Member] | TGP and SNG [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value					$ 80
Percent of legal expenses reimbursed by current property owner					50.00%
Minimum [Member] | 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]
Loss Contingency, Damages Sought, Value				$ 750
Minimum [Member] | Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense										$ 365
Maximum [Member] | Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense										3,200
EPA preferred alternative estimate [Member] | Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense										$ 1,700
AOC required engineering and design work [Member] | Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense		$ 165
Design [Member] | Lower Passaic River Study Area [Member] | Environmental Protection Agency [Member]
Loss Contingencies [Line Items]
Estimated Remedy Implementation Period		4 years
Clean Up Implementation [Member] | Lower Passaic River Study Area [Member] | Environmental Protection Agency [Member]
Loss Contingencies [Line Items]
Estimated Remedy Implementation Period		6 years

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