Environmental Matters (Details)										1 Months Ended	9 Months Ended	240 Months Ended
	Jul. 13, 2018 Defendants	May 04, 2018 USD ($) a	Jan. 06, 2017 USD ($)	Oct. 05, 2016 USD ($)	Jul. 28, 2016	Jun. 08, 2016 USD ($)	Dec. 18, 2015 USD ($)	Nov. 08, 2013 Defendants	Aug. 06, 2013 Defendants	Dec. 31, 2000 Terminals	Sep. 30, 2018 USD ($) Terminals Parties Defendants	Dec. 31, 1969	Dec. 31, 2017 USD ($)
Loss Contingencies [Line Items]
Accrual for environmental loss contingencies											$ 270,000,000		$ 279,000,000
Environmental recoveries receivable											$ 13,000,000		$ 13,000,000
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
Estimated Remedy Implementation Period						13 years
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 | Defendants								17
Judicial District of Louisiana [Member] | Vermilion Parish Louisiana Coastal Zone [Member] | Tennessee Gas Pipeline Company LLC [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, Damages Sought, Value											$ 175,000,000
Loss Contingency, Number of Defendants | Defendants									26		70
Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Number of Parties at a Joint Defense Group | Parties											44
Vintage Assets Inc. [Member] | Parish of Plaquemines, Louisiana [Member] | TGP and SNG [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value		$ 1,104					$ 80,000,000
Restore acreage | a		9.6
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						$ 750,000,000
Minimum [Member] | Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense											$ 365,000,000
Maximum [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			$ 1,100,000,000
Maximum [Member] | Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense											3,200,000,000
EPA preferred alternative estimate [Member] | Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Environmental Remediation Expense											$ 1,700,000,000
AOC required engineering and design work [Member] | Lower Passaic River Study Area [Member] | Pending Litigation [Member]
Loss Contingencies [Line Items]
Loss Contingency, Number of Defendants | Defendants	120
Environmental Remediation Expense				$ 165,000,000
Loss Contingency, New Claims Filed, Number	2
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