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Commitments and Contingencies - Investments in Affiliates and Other Entities (Details) | May 31, 2022 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Dec. 31, 2014 substation kV km
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Other Commitments [Line Items] |  |  |  |
Contributions to partnership in connection with certain investments and management fees |  |  | $ 13,700,000 |
Capital for Infrastructure Projects |  |  |  |
Other Commitments [Line Items] |  |  |  |
Outstanding capital commitment |  |  | 80,000,000.0 |
Planned Oil and Gas Infrastructure Projects |  |  |  |
Other Commitments [Line Items] |  |  |  |
Outstanding capital commitment |  |  | 6,700,000 |
Planned Oil and Gas Infrastructure Projects | Forecast |  |  |  |
Other Commitments [Line Items] |  |  |  |
Outstanding capital commitment | $ 400,000 | $ 6,300,000 |  |
EPC Electric Transmission Project |  |  |  |
Other Commitments [Line Items] |  |  |  |
Outstanding capital commitment |  |  | 0 |
Length of electrical transmission line to be constructed under contract | km |  |  |  | 500
Number of substations | substation |  |  |  | 2
Voltage of substations | kV |  |  |  | 500
Infrastructure Investors Partnership | Capital for Infrastructure Projects |  |  |  |
Other Commitments [Line Items] |  |  |  |
Outstanding capital commitment |  |  | $ 1,000,000,000.0 |

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- Definition Length of transmission line. + References No definition available. + Details
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- Definition Number of Substations + References No definition available. + Details
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- Definition Voltage Of Substations + References No definition available. + Details
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- Definition This item represents the entity's ownership percentage in the investee multiplied by the investee's total equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571 + Details
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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + 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. + Details
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