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Combined Guarantor Subsidiaries - Contingencies - Narrative (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)
Condensed Financial Statements Captions [Line Items]
Environmental liability insurance, maximum coverage per incident (up to)	$ 10,000,000
Environmental liability insurance, annual coverage limit (up to)	50,000,000
Guarantor Subsidiaries
Condensed Financial Statements Captions [Line Items]
Environmental liability insurance, maximum coverage per incident (up to)	10,000,000
Environmental liability insurance, annual coverage limit (up to)	$ 50,000,000

X

- Definition

Annual coverage limit provided by the insurance arrangement for environmental liability claims.

+ References

No definition available.

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X

- Definition

Environmental Liability Insurance, Maximum Coverage Per Incident

+ References

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+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Details

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