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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
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

X

- Definition

Length of transmission line.

+ References

No definition available.

+ Details

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- Definition

Number of Substations

+ References

No definition available.

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- Definition

Voltage Of Substations

+ References

No definition available.

+ Details

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X

- 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

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X

- 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.

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X

- 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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