Litigation and Environmental - Portland Harbor (Details) - Environmental Protection Agency - Portland Harbor Superfund Site, Willamette River, Portland, Oregon $ in Billions	Jan. 06, 2017 USD ($) Parties Terminals
GATX Terminals Corporation (n/k/a KMLT)
Site Contingency [Line Items]
Estimated Remedy Implementation Period	13 years
Number of Parties Involved In Site Cleanup Allocation Negotiations \| Parties	90
Number of Liquid Terminals	2
Environmental Remediation Expense \| $	$ 1.1
KMBT
Site Contingency [Line Items]
Number of Liquid Terminals	2

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The charge against earnings in the period for known or estimated future costs arising from requirements to perform environmental remediation activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 410
-SubTopic 30
-Section 45
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-Section 50
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