Transportation and Distribution Revenue - Schedules of Concentration of Risk (Details) - Product and services - Revenue |
12 Months Ended | ||
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Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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Natural gas transportation contracts | |||
Concentration Risk [Line Items] | |||
Percentage of revenues | 64.30% | 67.80% | 64.30% |
Natural gas distribution contracts | |||
Concentration Risk [Line Items] | |||
Percentage of revenues | 23.90% | 25.50% | 26.80% |
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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. No definition available.
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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